loading piston position 装载活塞位置
Piston needs to be cooled efficiently with increase of thermal loading of diesel engines.
由于柴油机热负荷不断提高，必须要对活塞进行有效冷却。
The loading characteristics and destruction pattern of DTH hammer pistons are examined. On the basis of this, Some measures are put forward to prolong the Service life of the piston.
本文从分析潜孔冲击器活塞的载荷及破坏情况入手，介绍了一些提高活塞寿命的措施。
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