Usually the compressive force is in the form of hammer blows using a power hammer or a press, as shown in Fig. 4.1.

通常压力都是以由如图4.1所示的动力锤或压力机提供的锤击形式出现。

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It can obviously decrease the press of the system in the situation of the output force and the diameter of the hydraulic cylinder is limited.

在输出力及液压缸直径一定的条件下，能显著降低系统的压力。

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The causes of vibration on high speed press consist mainly in the inertial force of crank slide mechanism and the working force of the press.

高速压机的振动原因，主要是曲柄滑块机构的惯性力和压制工作时的加工力。

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After outlining the principles contained in the South African constitution guaranteeing freedom of expression and the restrictive definition of its limits, Thloloe described the system of self-regulation of the press in force in his country.

UNESCO: Communication and Information