如果第二重合成橡胶阀座在火灾期间被损坏，则金属-金属阀座还可以保证气密性。
The metal-to-metal seat ensures tightness if the secondary elastomer seat is damaged during the fire.
咨询有关产品的使用寿命在非差分应用，用户手册，或为正常或严重合成油间隔的OEM服务。
For product service life in non-differential applications, consult owner's manual or the OEM for either normal or severe synthetic oil service intervals.
本文应用同步多重合成新技术分别在氯甲基树脂及MBHA树脂上成功地合成了二批抗生育寡肽类似物（1～6）。
Two pentapeptides (1,2) and four tetrapeptides (3~6) were prepared successfully by simultaneous multiple peptide synthesis (SMPS) on the merrifield's resin and MBHA resin respectively.
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