Enlarging Hammer(扁锤), 此释义来源于网络辞典。
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pneumatic back-enlarging hammer 气动回扩锤
To protect water hammer, the technologies of enlarging slow-closing time, prolongating closing distance of run and pressure relieving are adopted in this device.
为防止水击采用减缓关闭时间，拉长关闭行程和向外泄压等措施。
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