The cold water supply line to tempering valve should always be opened first to prevent possible thermostat damage.
通向调温阀的冷水供应管道应该总是先打开，以防止对温度调节装置可能产生的损害。
The practice has proved the steel pipe produced by on- line water quenching and tempering a rational technology with low cost and strong marketing competition.
实践证明，利用轧后余热对钢管进行在线水淬，工艺合理，加工成本低，产品具有较强的市场竞争力。
Winter swimming, i. e. swimming in ice-cold water, is a wonderful method not only of tempering the body, but also of increasing the energy might of the organism.
冬泳，在冰冷的水中游泳也就是说，是一个奇妙的方法，不仅锻炼了身体，又增加了机体的能量威力的。
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