其构成是塑料空心砖的平面、侧面设有密封槽、密封条、通孔，一次压制成型。
The flat face and the side face of the plastic hollow brick are provided with a sealing groove, a sealing strip and through holes; the plastic hollow brick can be formed once by pressing.
气门头可通过一次压制和烧结、两次压制和烧结、锻造和机加工、锻造和烧结及动磁压制成形和烧结而制成。
The valve head may be made by single press and sintering, double press and sintering, forging and machining, forging and sintering, and dynamic magnetic compaction and sintering.
美国股市在享受一次爆发式的反弹，反弹已经压制住了足够多的卖空者。 这些卖空者到现在已经预言深幅调整数月了。
The U.S. stock market is enjoying an explosive rally that has humbled plenty of bears, who have been predicting a deep correction for several months now.
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