It was proved by practice that the newly designed speed reducer had a good reliability and long service time, which exerted great significance for normal operation of the producing plants.
实践证明，新设计的旋转模头系统行星齿轮减速器可靠性好使用寿命长，为生产装置的正常运行起到了极为重要的作用。
The shearer hydraulic system is an important part of the shearer. The service life and reliability of the shearer depend on the clean degree of hydraulic system in great extent.
采煤机液压系统是采煤机的重要组成部分，采煤机的使用寿命和可靠性在很大程度上取决于液压系统的清洁度。
The service reliability and the storage lifetime of ammunition or component filled black powder depend on moisture absorption and deliquescence of black powder to a great extent.
黑药的吸湿与潮解，在很大的程度上决定着炮弹或装有黑药元件的使用可靠性和储存寿命。
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