精密级 meaning in Chinese

micron order

Adopts precision seamless ball and lead screw for movements along x , y axis
轴运动采用精密级无间隙滚珠丝杠传动。
Centrifugal , mixed flow and axial pumps - code for hydraulic performance tests - precision class
离心泵混流泵和轴流泵水力性能试验规范精密级
Centrifugal , mixed flow and axial pumps - code for hydraulic performance tests - precision class
离心式混流轴向泵.液压性能试验规程.精密级
Be over 3 years ' experience at tooling building or maintenance position in high precision progressive die field
3年以上在高精密级进模行业内，模具制造，维护的工作经验。
Centrifugal , mixed flow and axial pumps - code for hydraulic performance tests - precision class iso 5198 : 1987 ; german version en iso 5198 : 1998
离心泵混流泵和轴流泵.液压性能试验规范.精密级

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