预防性维修

Ensure the implementation of preventive maintenance to be resultful and update the PM plan timely.

确保预防性的维修保养工作及时、有效的进行。

Responsible for the installation, repair, modifications and preventive maintenance of process analysers and portable analysers.

负责工艺分析仪器和便携式分析仪器的安装、维修、修正和预防性维护。

Responsible for the installation, repair, modifications and preventive maintenance of process analyzers and portable analyzers.

负责工艺分析仪器和便携式分析仪器的安装、维修、修正和预防性维护。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。