查询词典 backflow

Arrow type check valve used to be installed between drill stem and bit to prevent drilling fluid backflow from the bottom.

箭形止回阀用以安装在钻杆和钻头之间防止钻井液从井底回流。

Another problem can occur rarely if backflow of process gas is permitted into the secondary air feed line.

如果工艺气体回流入二段空气管线，能发生另外的很少发生的问题。

Therefore, for to QL treatment prostate gland disease effective component screening, first uses 95% ethyl alcohol backflow to raise Takes, the recycling ethyl alcohol, the watering dissolves, divides into the water-soluble spot and the water does not dissolve the spot, on Shui Jianye the pocket resin divides into the laundering spot and mellowly washes the spot.

因此，为了对QL治疗前列腺疾病有效成分的筛选，首先用95%乙醇回流提取，回收乙醇，加水溶解，分成水溶部位和水不溶部位，水煎液上大孔树脂分成水洗部位和醇洗部位。

The research indicated that under the compound use of hydroquinone and methyl quinone or independent use of phenothiazines or nitrogen oxygen free radical made the polymerization retarder, opposite-methyl-phenylsulfon made the esterification catalyst, toluol made the backflow including water condition, the acid mellowly compared to when it was 1.15, the production rate of the synthesis methylacrylic acid polyethylene glycol single methyl ether (400) ester may achieve 98.9%, was extremely similar to the overseas product functional group structure.

研究表明，在氢醌、甲醌复合使用或者单独使用吩噻嗪、氮氧自由基哌啶酮作阻聚剂，对甲苯磺酸作酯化催化剂、甲苯作回流带水的条件下、酸醇比为1.5时，合成的甲基丙烯酸聚乙二醇单甲醚(400)酯产率可以达到98.9%，与国外产品官能团结构十分相似。

Headstock piece on media flows and forces open or closed to prevent backflow valve media called a non-return valve.

启闭件靠介质流动和力量自行开启或关闭，以防止介质倒流的阀门叫止回阀。

NOTE: DO NOT USE A PIPE WRENCH TO REMOVE THE RELIEF VALVE ASSEMBLY FROM THE BACKFLOW PREVENTER.

注意：不要使用管钳从防回流阀上拆卸安全阀总成。

There are pressure gauge in each control zone, and increases control system of anti-backflow in cooling zone.

在控制的各区段间安装压差表，并在冷却段增加防倒灌控制系统。

Annual inspection is required of the backflow preventer to insure proper operation of the device.

为了保证装置的正常运行，要求对防回流阀进行年度检查。

The enclosure and the backflow preventer shall be covered by a single warranty policy.

这种外壳和防回流阀应该应用相同的质量保证政策。

To avoid this discharge, install a spring-loaded, rubber seated check valve ahead of the backflow assembly.

为了避免这种排放，要在防回流阀总成前面安装一个弹簧驱动、橡胶阀座的止回阀。

I am sure after a few weeks of adaptation and familiarization I will have no difficulty in functioning on a daily basis in an English speaking society or in participating fully in graduate studies.

在大学的三年的学习生活不仅给予我自身的充实，更重要的是磨练和培养了我较强的自觉能力和严谨，踏实的作风以及不怕困难的精神，对未来充满了信心！

As the first volcanoes erupted, one of the gases that bellowed out was steam.

在第一批火山喷发时，喷出的气体之一就是水蒸汽。