preventer

1.effective as preventers of further infection.

作为进一步感染的防止药物是有效的。

2.While underbalance drilling spreads greatly, rotating blowout preventer, as a kind of high technical product, is the crucial equipment to control well pressure.

国内欠平衡钻井普遍实,要用到的旋防喷器是关键备,技术含量高。

3.Note: A strainer is recommended to be installed ahead of the backflow preventer to prevent the fouling of the check assembly and resulting spillage from the valve during repressurization.

注：建议在防回流阀前安装一个过滤器，防止由于止回阀到污染而导致这种阀门在再增压期间产生泄漏或溢出。