Crude oil that has a greater shrinkage with pressure reduction than normal crude oil.

在压力降低的情况下收缩率高于正常原油收缩率的原油。

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The pressure compresses the polymer and allows more materials to flow into the mold. Shrinkage is reduced and better quality moldings are produced.

高压压缩了聚合物并能使更多的材料流人模腔。这样，“收缩”就减少了，生产的成型件的质量就得以提高。

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Therefore, if molds were filled at atmospheric pressure, "shrinkage" would make the molding deviate from the SHAPE of the mold.

因此，如果在大气压下向模子充料，成型件会因“收缩”而与模子的形状形成偏差。

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