E+H渦(wo)(wo)街流量(liang)計(ji)(ji)也稱之為旋(xuan)渦(wo)(wo)流量(liang)計(ji)(ji)或(huo)卡門渦(wo)(wo)街流量(liang)計(ji)(ji)。綜(zong)合吸收(shou)發達(da)國家技術和總結(jie)多年研究生產(chan)經驗的基礎上進行精心設計(ji)(ji)的產(chan)品(pin)(pin),實現了產(chan)品(pin)(pin)智能化、標準化、系列化、通用化、生產(chan)模具(ju)(ju)化、確保(bao)產(chan)品(pin)(pin)質量(liang)的美觀性。該產(chan)品(pin)(pin)具(ju)(ju)有電路、功耗微(wei)低、量(liang)程比(bi)寬、結(jie)構簡(jian)單(dan)、阻(zu)力損失(shi)小(xiao)、堅固耐用、用途廣(guang)、使用壽(shou)命長、工(gong)作穩定(ding)、便于安(an)裝調試等特(te)點。德國原裝E+H渦(wo)(wo)街流量(liang)計(ji)(ji)
72F1H-SE3AD1AAA4AA 72F2H-SE3AD1AAA4AA 91WA1-BA2B10AKA4AA 91WA1-BA2B10AKA4AA
72F80-SE0AA1CAA4AW 50W1H-UC0A1AA0AAAW 50W1F-HA0A1AA0AAAW 80M50-AS2AAAAAAAAA
83F-40AD2SAAACAHAA 65F15-AE2AG1AAABAA 72F2H-SK0AA1CAA4AA 83I80-AD2WFBA1AGAJ
83I50-AD2WFBA1AGAJ 72F25-SE0AA1AAA4AW 91WA1-BA1B10ACA4AA 91WA1-BB1B10ACA5AA
91WA1-BB1B10ACA5AA 72F1H-SE0AA1AAA4AW 72F40-SE3AD1AAA4AA 72F1F-SE3AD1AAA4AA
72F1H-SE3AD1AAA4AA 72F2H-SE3AD1AAA4AA 80F80-AD2SAAAAADAD 50W2F-UD0A1AA0AAAA
50W1H-UC0A1AA0AAAA 50P1H-EC0A1AA0AAAA 72F50-SE0AA1AAA4AW 50W50-UA0A1AA0AAAA
72F2H-SA0AA1AAA4AW 80F80-AD2SAA4AAAAA 80F50-AD2SAA4AAAAA 53W4H-UD0B1AA0AHAA
53W2H-UD0B1AA0AHAA 53P1Z-AC0B1AA0AHAA 53P50-AA0B1AA0AHAA 72F40-SE0AA1AAA3AA
10H50-UF0A1AA0A4AA 50H1H-1F0A1AA0AAAA 50H1H-UF0A1AA0AAAA 10P25-EA0A1AA0A4AA
10P40-EA0A1AA0A4AA 10P65-EC0A1AA0A4AA 50P15-EA0A1AA0AAAW 83A02-ASVWAAAAAAAA
E+H渦街(jie)流(liu)量(liang)計(ji)也稱之為旋(xuan)渦流(liu)量(liang)計(ji)或卡門(men)渦街(jie)流(liu)量(liang)計(ji)。綜合吸收發達國家技(ji)術和總結(jie)多(duo)年(nian)研究(jiu)生(sheng)(sheng)產(chan)經驗的基礎上進行精心(xin)設計(ji)的產(chan)品(pin),實(shi)現了產(chan)品(pin)智(zhi)能化(hua)(hua)、標準化(hua)(hua)、系列化(hua)(hua)、通用(yong)化(hua)(hua)、生(sheng)(sheng)產(chan)模具化(hua)(hua)、確保產(chan)品(pin)質量(liang)的美觀性。該產(chan)品(pin)具有電路、功耗(hao)微低、量(liang)程比寬(kuan)、結(jie)構簡單、阻力損失小、堅固耐用(yong)、用(yong)途(tu)廣、使用(yong)壽命長、工作穩定、便于安裝(zhuang)調試等特點。
參(can)數及要求(qiu)
◆測量介質: 氣體(ti)、液體(ti)、蒸氣
溫壓補償型渦(wo)街(jie)流量計——迪(di)元儀表(biao)
◆連接方式:法(fa)蘭卡(ka)裝式、法(fa)蘭式、插(cha)入式
◆口徑(jing)規格 法蘭卡(ka)裝(zhuang)式口徑(jing)選擇 25,32,50,80,10
◆法蘭連接式口徑(jing)選擇 100,150,200
◆流(liu)(liu)量(liang)測(ce)量(liang)范圍 正常(chang)測(ce)量(liang)流(liu)(liu)速范圍 雷諾(nuo)數1.5×104~4×106;氣(qi)體(ti)5~50m/s; 液體(ti)0.5~7m/s
正(zheng)常測(ce)量(liang)流量(liang)范圍(wei)(wei) 液體(ti)、氣體(ti)流量(liang)測(ce)量(liang)范圍(wei)(wei)見表2; 蒸氣流量(liang)范圍(wei)(wei)見表3
◆測(ce)量精度 1.0 1.5
◆被(bei)測介質溫(wen)(wen)度(du):常溫(wen)(wen)–25℃~100℃,高(gao)溫(wen)(wen)–25℃~150℃ -25℃~250℃
◆輸出(chu)信(xin)號(hao) 脈沖電壓(ya)輸出(chu)信(xin)號(hao) 高電平8~10V 低電平0.7~1.3V
◆脈沖(chong)占空比約50%,傳輸距離為100m
◆脈沖電流遠傳(chuan)(chuan)信號 4~20 mA,傳(chuan)(chuan)輸距離為1000m
◆儀表使用環境(jing) 溫度:-25℃~+55℃ 濕度:5~90% RH50℃
分離式渦(wo)街流(liu)量計——迪元儀表
◆材質 不銹(xiu)鋼, 鋁合金(jin)
◆電源(yuan) DC24V或鋰電池3.6V
◆防爆等(deng) 本安(an)型iaIIbT3-T6,防護等(deng) IP65
72F50-SE0AA1AAA4AA德(de)國進(jin)口(非導電液體)E+H渦街流量計(ji)
72F40-SE0AA1DAA4AW 72F25-SE0AA1DAA4AW 72F1H-SE0AA1DAA4AW 72F80-T56AA12AA4AW
72F80-SE0AA1DAA4AW 50H1H-0F0A1AB0AAAA 53W4H-UD0B1AA0AHAA 72F50-SE0AA1AAA4AA
91WA1-AA1B30RCC4AA 80F1H-AAASAARABFAA 10W1H-UC0A1AA0A4AA 50W1Z-UC0A1AA0AAAA
50W1F-UC0A1AA0AAAA 91WA1-AA2B12ACA4AA 91WA1-AA3B12ACA4AA 10P1H-EC1A1AA0A4AA
93WA2-AA3B10ACAGAA 40E15-AD2SAAAAA5AA 72F1F-SE0AA1DAA4AW 50W25-UA0A1AA0AAAW
50W50-UA0A1AA0AAAW 80F80-CD2SAAAAA3AA 72F80-SE0AA1AAA4AW 50H15-DB0A1AA0A3AA
50H04-DB1A1AA0A3AA 50H08-DAOA1AAOA4AA 50H08-DA0A1AA0A3AA 72W1F-SE0AA1AAA4AA
50P25-EA1A1AA0ABAA 50W1F-UC0A1AA0ABAA 50W2H-UD0A1AA0ABAA 65F40-BE2AG1AAAAAA
50P50-EA1A1AA0BAAA 50P80-EA1A1AA0BAAA 80M50-AS2AABAAAAA8 73F2H-SD4AA1AAA4AA
10W50-UA0A1AA0A4AA 50w50-UA0A1AA0AAAW 53P15-EL2B1BG1BGAK 50P2H-EC0A1AA0AAA3
50P50-EA0A1AA0AAAA 83M25-ASBAAABEBHAA 83M25-ASAAAABEBHAA 90WA0-AB3A10ACAAAA
72F25-SE0AA1AAA4AW 50W4F-HC0A1AK4ACAW 72W1H-SE1AA1AAA4AW 72F1H-SE1AA1AAA4AW
10H65-UF0A1AA0A4AA 91WA1-BA1A10ACA4AA 53W80-HC0B1AA0AAAA 72F80-SE0AA1AAA4AA
50W2H-HD0A1AK2AAAA 50W8H-HD0A1AK2AAAA 50W3H-HD0A1AK2AAAA 72F80-SE1AA1AAA4AW
10P32-EA0A1AA0A4AA 10P80-EC1A1AA0B4AA 10P50-EA1A1AA0A4AA 50P1H-EA0A1AA0AAAA
72F25-SE1AA1CAB4AW 50P32-EF1A1AA0AAAW 50P15-EF1A1AA0AAAW 50P50-EA1A1AA0BAAA
50P80-EA1A1AA0BAAA 80M50-AS2AABAAAAA8 50W1H-HC0A1AA0AAAW 50P15-EA0A1AA0AAAW
10P32-EA0A1AA0A4AA 50W50-UA0A1AA0AAAW 91WA1-AA2A10ACA4AA 53P2H-EC0B1AA0AAAA
93WA2-AB3B10ACAAAA 5BH08-VF0A1AB041A1 53H40-1F0B1AA0ADAA 72F50-SE0AA1AAA4AA
72F1F-SE0AA1AAA4AA 72F2H-SE0AA1AAA4AA 10W40-UA0A1AA0A4AA 10W1Z-UC0A1AA0A4AA
德國(guo)進口(非(fei)(fei)導電液體(ti))E+H渦(wo)街(jie)流量計原理(li):在流體(ti)中(zhong)設置(zhi)三(san)角(jiao)柱型旋(xuan)(xuan)渦(wo)發(fa)生體(ti),則(ze)從旋(xuan)(xuan)渦(wo)發(fa)生體(ti)兩側交替地(di)產生有規則(ze)的旋(xuan)(xuan)渦(wo),這種(zhong)旋(xuan)(xuan)渦(wo)稱(cheng)(cheng)為(wei)卡(ka)門旋(xuan)(xuan)渦(wo),旋(xuan)(xuan)渦(wo)列在旋(xuan)(xuan)渦(wo)發(fa)生體(ti)下游非(fei)(fei)對稱(cheng)(cheng)地(di)排列。
渦街(jie)流量(liang)(liang)計是根據卡門渦街(jie)原理(Kármán Vortex Street)測量(liang)(liang)氣體(ti)(ti)、蒸(zheng)汽(qi)或液體(ti)(ti)的體(ti)(ti)積(ji)流量(liang)(liang)、標況的體(ti)(ti)積(ji)流量(liang)(liang)或質量(liang)(liang)流量(liang)(liang)的體(ti)(ti)積(ji)流量(liang)(liang)計。并可作為(wei)流量(liang)(liang)變送器應用于自動(dong)化控制(zhi)系統中(zhong)。
渦街(jie)流(liu)量計是應(ying)用(yong)流(liu)體振蕩原理來(lai)測量流(liu)量的,流(liu)體在管道中經過(guo)(guo)渦街(jie)流(liu)量變送器(qi)時(shi),在三角柱的旋渦發(fa)(fa)生(sheng)(sheng)體后上下交替(ti)產生(sheng)(sheng)正比于流(liu)速(su)的兩列(lie)旋渦,旋渦的釋放頻(pin)率與流(liu)過(guo)(guo)旋渦發(fa)(fa)生(sheng)(sheng)體的流(liu)體平均速(su)度及旋渦發(fa)(fa)生(sheng)(sheng)體特征寬度有(you)關,可(ke)用(yong)下式表示:
式(shi)中:為旋渦
德國進口(非導電液(ye)體)E+H渦街(jie)流量計
72F1H-SE3AD1AAA4AA 72F2H-SE3AD1AAA4AA 91WA1-BA2B10AKA4AA 91WA1-BA2B10AKA4AA
72F80-SE0AA1CAA4AW 50W1H-UC0A1AA0AAAW 50W1F-HA0A1AA0AAAW 80M50-AS2AAAAAAAAA
83F-40AD2SAAACAHAA 65F15-AE2AG1AAABAA 72F2H-SK0AA1CAA4AA 83I80-AD2WFBA1AGAJ
83I50-AD2WFBA1AGAJ 72F25-SE0AA1AAA4AW 91WA1-BA1B10ACA4AA 91WA1-BB1B10ACA5AA
91WA1-BB1B10ACA5AA 72F1H-SE0AA1AAA4AW 72F40-SE3AD1AAA4AA 72F1F-SE3AD1AAA4AA
72F1H-SE3AD1AAA4AA 72F2H-SE3AD1AAA4AA 80F80-AD2SAAAAADAD 50W2F-UD0A1AA0AAAA
50W1H-UC0A1AA0AAAA 50P1H-EC0A1AA0AAAA 72F50-SE0AA1AAA4AW 50W50-UA0A1AA0AAAA
72F2H-SA0AA1AAA4AW 80F80-AD2SAA4AAAAA 80F50-AD2SAA4AAAAA 53W4H-UD0B1AA0AHAA
53W2H-UD0B1AA0AHAA 53P1Z-AC0B1AA0AHAA 53P50-AA0B1AA0AHAA 72F40-SE0AA1AAA3AA
10H50-UF0A1AA0A4AA 50H1H-1F0A1AA0AAAA 50H1H-UF0A1AA0AAAA 10P25-EA0A1AA0A4AA
10P40-EA0A1AA0A4AA 10P65-EC0A1AA0A4AA 50P15-EA0A1AA0AAAW 83A02-ASVWAAAAAAAA
E+H渦街流量(liang)(liang)(liang)計(ji)也(ye)稱之為旋渦流量(liang)(liang)(liang)計(ji)或卡門渦街流量(liang)(liang)(liang)計(ji)。綜合(he)吸收發達國家(jia)技術和總結多年研究生產(chan)(chan)(chan)經驗的基(ji)礎上進行精心設計(ji)的產(chan)(chan)(chan)品(pin)(pin),實現了產(chan)(chan)(chan)品(pin)(pin)智能化(hua)(hua)、標(biao)準化(hua)(hua)、系(xi)列化(hua)(hua)、通用化(hua)(hua)、生產(chan)(chan)(chan)模具化(hua)(hua)、確保產(chan)(chan)(chan)品(pin)(pin)質量(liang)(liang)(liang)的美觀性。該產(chan)(chan)(chan)品(pin)(pin)具有電路、功(gong)耗微低、量(liang)(liang)(liang)程比寬、結構簡單、阻力損(sun)失小、堅固耐用、用途(tu)廣、使用壽命長、工作穩定、便(bian)于安裝調試等特點(dian)。德(de)國原裝E+H渦街(jie)流量(liang)計(ji)
參數及(ji)要求
◆測量介質: 氣體、液體、蒸氣
溫壓補償型渦街流量計——迪元儀(yi)表
◆連接方式(shi):法蘭卡裝式(shi)、法蘭式(shi)、插(cha)入式(shi)
◆口(kou)徑規格 法(fa)蘭(lan)卡裝(zhuang)式口(kou)徑選擇 25,32,50,80,10
◆法蘭連接式口徑選擇 100,150,200
◆流量(liang)測量(liang)范(fan)圍 正常測量(liang)流速范(fan)圍 雷(lei)諾(nuo)數1.5×104~4×106;氣體5~50m/s; 液體0.5~7m/s
正常測(ce)量(liang)(liang)流(liu)量(liang)(liang)范圍(wei) 液體(ti)、氣(qi)體(ti)流(liu)量(liang)(liang)測(ce)量(liang)(liang)范圍(wei)見表2; 蒸氣(qi)流(liu)量(liang)(liang)范圍(wei)見表3
◆測(ce)量精度 1.0 1.5
◆被測介質(zhi)溫(wen)度:常(chang)溫(wen)–25℃~100℃,高(gao)溫(wen)–25℃~150℃ -25℃~250℃
◆輸出信(xin)號(hao)(hao) 脈沖電(dian)壓輸出信(xin)號(hao)(hao) 高電(dian)平8~10V 低電(dian)平0.7~1.3V
◆脈沖占空比約50%,傳輸(shu)距(ju)離為(wei)100m
◆脈(mo)沖(chong)電流遠(yuan)傳信(xin)號 4~20 mA,傳輸(shu)距(ju)離為1000m
◆儀表使用環境 溫度:-25℃~+55℃ 濕度:5~90% RH50℃
分(fen)離(li)式渦街流量(liang)計(ji)——迪元儀表(biao)
◆材質(zhi) 不銹鋼, 鋁(lv)合金
◆電源 DC24V或鋰電池3.6V
◆防爆(bao)等(deng) 本安型(xing)iaIIbT3-T6,防護等(deng) IP65
72F50-SE0AA1AAA4AA德國進口(kou)(非(fei)導(dao)電(dian)液體)E+H渦街流量計(ji)
72F40-SE0AA1DAA4AW 72F25-SE0AA1DAA4AW 72F1H-SE0AA1DAA4AW 72F80-T56AA12AA4AW
72F80-SE0AA1DAA4AW 50H1H-0F0A1AB0AAAA 53W4H-UD0B1AA0AHAA 72F50-SE0AA1AAA4AA
91WA1-AA1B30RCC4AA 80F1H-AAASAARABFAA 10W1H-UC0A1AA0A4AA 50W1Z-UC0A1AA0AAAA
50W1F-UC0A1AA0AAAA 91WA1-AA2B12ACA4AA 91WA1-AA3B12ACA4AA 10P1H-EC1A1AA0A4AA
93WA2-AA3B10ACAGAA 40E15-AD2SAAAAA5AA 72F1F-SE0AA1DAA4AW 50W25-UA0A1AA0AAAW
50W50-UA0A1AA0AAAW 80F80-CD2SAAAAA3AA 72F80-SE0AA1AAA4AW 50H15-DB0A1AA0A3AA
50H04-DB1A1AA0A3AA 50H08-DAOA1AAOA4AA 50H08-DA0A1AA0A3AA 72W1F-SE0AA1AAA4AA
50P25-EA1A1AA0ABAA 50W1F-UC0A1AA0ABAA 50W2H-UD0A1AA0ABAA 65F40-BE2AG1AAAAAA
50P50-EA1A1AA0BAAA 50P80-EA1A1AA0BAAA 80M50-AS2AABAAAAA8 73F2H-SD4AA1AAA4AA
10W50-UA0A1AA0A4AA 50w50-UA0A1AA0AAAW 53P15-EL2B1BG1BGAK 50P2H-EC0A1AA0AAA3
50P50-EA0A1AA0AAAA 83M25-ASBAAABEBHAA 83M25-ASAAAABEBHAA 90WA0-AB3A10ACAAAA
72F25-SE0AA1AAA4AW 50W4F-HC0A1AK4ACAW 72W1H-SE1AA1AAA4AW 72F1H-SE1AA1AAA4AW
10H65-UF0A1AA0A4AA 91WA1-BA1A10ACA4AA 53W80-HC0B1AA0AAAA 72F80-SE0AA1AAA4AA
50W2H-HD0A1AK2AAAA 50W8H-HD0A1AK2AAAA 50W3H-HD0A1AK2AAAA 72F80-SE1AA1AAA4AW
10P32-EA0A1AA0A4AA 10P80-EC1A1AA0B4AA 10P50-EA1A1AA0A4AA 50P1H-EA0A1AA0AAAA
72F25-SE1AA1CAB4AW 50P32-EF1A1AA0AAAW 50P15-EF1A1AA0AAAW 50P50-EA1A1AA0BAAA
50P80-EA1A1AA0BAAA 80M50-AS2AABAAAAA8 50W1H-HC0A1AA0AAAW 50P15-EA0A1AA0AAAW
10P32-EA0A1AA0A4AA 50W50-UA0A1AA0AAAW 91WA1-AA2A10ACA4AA 53P2H-EC0B1AA0AAAA
93WA2-AB3B10ACAAAA 5BH08-VF0A1AB041A1 53H40-1F0B1AA0ADAA 72F50-SE0AA1AAA4AA
72F1F-SE0AA1AAA4AA 72F2H-SE0AA1AAA4AA 10W40-UA0A1AA0A4AA 10W1Z-UC0A1AA0A4AA
德國進口(非導電液體(ti)(ti))E+H渦(wo)(wo)街流量計原理:在流體(ti)(ti)中設置三(san)角柱型(xing)旋(xuan)渦(wo)(wo)發生(sheng)(sheng)體(ti)(ti),則從(cong)旋(xuan)渦(wo)(wo)發生(sheng)(sheng)體(ti)(ti)兩側交替地(di)產生(sheng)(sheng)有(you)規(gui)則的旋(xuan)渦(wo)(wo),這種旋(xuan)渦(wo)(wo)稱(cheng)為卡門(men)旋(xuan)渦(wo)(wo),旋(xuan)渦(wo)(wo)列在旋(xuan)渦(wo)(wo)發生(sheng)(sheng)體(ti)(ti)下游非對(dui)稱(cheng)地(di)排列。
渦(wo)街流(liu)量(liang)(liang)(liang)計(ji)是根據卡門渦(wo)街原(yuan)理(li)(Kármán Vortex Street)測量(liang)(liang)(liang)氣體、蒸(zheng)汽或液體的體積(ji)流(liu)量(liang)(liang)(liang)、標況的體積(ji)流(liu)量(liang)(liang)(liang)或質(zhi)量(liang)(liang)(liang)流(liu)量(liang)(liang)(liang)的體積(ji)流(liu)量(liang)(liang)(liang)計(ji)。并(bing)可作為流(liu)量(liang)(liang)(liang)變送(song)器應用于(yu)自動化控制系統(tong)中。
渦(wo)街流(liu)量(liang)計是應用(yong)流(liu)體(ti)(ti)振蕩原理來測量(liang)流(liu)量(liang)的(de)(de),流(liu)體(ti)(ti)在管道(dao)中(zhong)經(jing)過(guo)(guo)渦(wo)街流(liu)量(liang)變送器時,在三角柱的(de)(de)旋渦(wo)發生體(ti)(ti)后(hou)上下交替(ti)產(chan)生正比(bi)于流(liu)速的(de)(de)兩(liang)列旋渦(wo),旋渦(wo)的(de)(de)釋放(fang)頻率與流(liu)過(guo)(guo)旋渦(wo)發生體(ti)(ti)的(de)(de)流(liu)體(ti)(ti)平均(jun)速度(du)及旋渦(wo)發生體(ti)(ti)特征寬度(du)有(you)關,可用(yong)下式表示:
式中:為(wei)(wei)旋渦的釋放頻率,單(dan)位為(wei)(wei)Hz;v為(wei)(wei)流(liu)過旋渦發生體(ti)的流(liu)體(ti)平均速度,單(dan)位為(wei)(wei)m/s;d為(wei)(wei)旋渦發生體(ti)特(te)(te)征(zheng)寬度,單(dan)位為(wei)(wei)m;Sr為(wei)(wei)斯特(te)(te)勞(lao)哈(ha)爾(er)數(Strouhal number),無量綱,它的數值(zhi)范圍為(wei)(wei)0.14-0.27。
St是雷諾數(shu)的函(han)數(shu)。
當雷(lei)諾數Re在(zai)范圍內,St值約(yue)為0.2。在(zai)測量中,要(yao)盡量滿(man)足流體的雷(lei)諾數在(zai),此時旋渦頻率。
由此,通過測量(liang)旋(xuan)渦(wo)頻率就可以計(ji)算(suan)出流過旋(xuan)渦(wo)發(fa)生體(ti)的(de)(de)流體(ti)平(ping)均(jun)速度v,再由式可以求出流量(liang)q,其(qi)中A為流體(ti)流過旋(xuan)渦(wo)發(fa)生體(ti)的(de)(de)截面積。
的(de)釋放頻率,單位(wei)(wei)為(wei)Hz;v為(wei)流(liu)過旋渦發生體(ti)的(de)流(liu)體(ti)平均(jun)速度,單位(wei)(wei)為(wei)m/s;d為(wei)旋渦發生體(ti)特征寬度,單位(wei)(wei)為(wei)m;Sr為(wei)斯(si)特勞哈爾數(Strouhal number),無量(liang)綱,它的(de)數值范圍為(wei)0.14-0.27。
St是(shi)雷諾數的函數。
當雷諾(nuo)數(shu)(shu)Re在(zai)范圍內,St值約為0.2。在(zai)測量(liang)(liang)中,要盡量(liang)(liang)滿足流體(ti)的雷諾(nuo)數(shu)(shu)在(zai),此時旋渦頻(pin)率。
由此,通過測量旋(xuan)渦(wo)頻(pin)率(lv)就可(ke)(ke)以(yi)計(ji)算出(chu)流(liu)過旋(xuan)渦(wo)發(fa)生體(ti)的(de)流(liu)體(ti)平均(jun)速度v,再(zai)由式可(ke)(ke)以(yi)求出(chu)流(liu)量q,其中(zhong)A為流(liu)體(ti)流(liu)過旋(xuan)渦(wo)發(fa)生體(ti)的(de)截面(mian)積。德國原(yuan)裝E+H渦街流量計