高压气体流过密封环顶端并进入其后面，施加向外的压力到缸筒壁上。

It passes over the top of the ring, and gets behind it to force it outward against the cylinder wall.

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产品用途：高压电器件的绝缘浇注料、环氧灌封料、塑封料、包封料、绝缘子、干式变压器、高压互感器、填料等。

Uses:Packing of high tension electrical equipment, epoxy pouring packing material, plastic pacing material, dry type transformer, high tension mutual inductance equipment, insulator.

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利用金刚石对顶砧(DAC)装置产生高压，在室温下对环庚烷进行了高压原位拉曼光谱研究。

In situ Raman spectra of cycloheptane have been characterized under high pressure generated by diamond anvil cell (DAC) at room temperature.

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