-
Usually select the vacuum pump is higher than that vacuum equipment vacuum half to one order of magnitude.
通常选择泵的真空度要下于真空设备真空度半个到一个数目级。
youdao
-
Usually select the vacuum pump is higher than that vacuum equipment vacuum half to one order of magnitude.
通常选择泵的真空度要下于真空设备真空度半个到一个数目级。
youdao