妨碍物;

The blowout preventer was made by Cameron International, a specialist engineer.
而防喷装置是卡梅伦国际(一家专业工程公司)承建.
来源:互联网摘选Backflow preventer manufactured from 300 Series stainless steel for corrosion resistance.
防回流阀采用耐腐蚀的300系列不锈钢制造.
来源:互联网摘选Slowly open upstream shutoff and allow the backflow preventer to fill slowly.
慢慢开启上游关闭阀,让防回流阀慢慢注水.
来源:互联网摘选Contact the factory for specific approvals on the reduced pressure backflow preventer.
如果需要特殊的减压防回流阀的认证,请与工厂联系.
来源:互联网摘选Ram-type blowout preventer is important equipment used in oil drilling operation.
闸板防喷器是石油钻井过程中的一种重要设备.
来源:互联网摘选If you use preventer medicine , take it asby your doctor or asthma nurse.
如果你在使用预防药,最好按照说明或遵从医嘱.
来源:互联网摘选Other medicines are also available-include long-acting reliever and preventer tablets.
还有一些其他的 长效 的缓解类和预防类药物的片剂.
来源:互联网摘选
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