number of friction pairs的用法和樣例：
例句
- Secondly, the performance of friction couples are tested under the condition of USM running.
接著(zhù)在電機運轉的條件下，對耐磨材料組成的摩擦副的表現進(jìn)行評價(jià)和優(yōu)選。 - Results show that effect of temperature should not be neglected in researching the lubrication of cam-tappet pairs.
在對此類(lèi)摩擦副進(jìn)行潤滑研究時(shí)，不能忽略溫度因素的影響。
