Rotary sprayers use gear driven or impact hammer mechanisms to rotate the spray head in a circle.

使用旋转式喷雾器齿轮驱动或影响锤机制，旋转一圈的喷头。

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Ulteriorly, considering the local head loss in inlet opening and pipes junction plays more important role in the calculative results of water hammer pressure calculation of the short pipeline system.

考虑进口及多管道连接处的局部水头损失对短管道系统水击压强的计算结果影响较大。

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The perfect hammer head can be obtained by designing technological equipment, using vertical pouring and string casting process in CO2-sodium silicate sand.

采用CO2硬化水玻璃砂无箱立浇串铸工艺，设计工装，可以获得优质健全的锤头产品。

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That's when he got the rubber hammer in the head.

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According to Patterson's affidavit, Hammer said that Freitas was shot in the head during an argument with Vanpelt over the car.

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The gags are far from politically correct, usually involving someone getting bonked in the head with a hammer or a brick.

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