无触点设计的计步方式，使其理论使用寿命达到无限次。

A step counting mode without contact points ensures that the service life on theory is infinite.

youdao

对提高窑炉设计及施工精度，延长使用寿命有较高的理论和实际价值。

It is of great practical value to improve kiln design and construction precision, prolong service life.

youdao

本文运用系统仿真的原理结合可靠度理论分别研究了钢筋混凝土桥梁在整体腐蚀和局部腐蚀及裂缝扩展组合效应下使用寿命及其可靠性。

Service-lifetime and reliability is estimated considering two models of uniform corrosion with effect of cracks and local corrosion on the theoretic of system simulation and reliability.

youdao