A.0~100B.20~100C.30~100D.-10~100
A.沒有氣源B.孔板裝反C.負(fù)壓室有空氣D.負(fù)壓管有滲漏
A.齒輪流量計(jì)B.電磁流量計(jì)C.轉(zhuǎn)子流量計(jì)D.靶式流量計(jì)