剧情简介
直径为φ108×4mm,直管长度(dù )为70m、各种(zhǒng )管件的当(dāng )量长度之和为100m(不包(bāo )括进(jìn )口和出口(kǒu )阻力(lì )),摩擦系(xì )数为0.027,输送(sòng )量为50 m3/h,两槽液面恒定(dìng ),其间(jiān )垂直距离为20m,则泵所需的
剧情简介直径为φ108×4mm,直管长度(dù )为70m、各种(zhǒng )管件的当(dāng )量长度之和为100m(不包(bāo )括进(jìn )口和出口(kǒu )阻力(lì )),摩擦系(xì )数为0.027,输送(sòng )量为50 m3/h,两槽液面恒定(dìng ),其间(jiān )垂直距离为20m,则泵所需的
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