您要查找的是不是：
- Disconnection in the preventive test for series coupling capacitors brings some difficulties and dangers to the maintenance test. 在对串级耦合电容器进行预防性试验时需要拆头,给检修试验工作带来一定困难和危险。
- For use with backflow preventer test cocks to protect from damage. 用于防回流阀测试旋塞，防止受到破坏。
- A sand control pipe of metal funicle,which is made by metal funicle with filtrate material is developed successfully in order to prevent test tools blockage and sand production. 为预防地层出砂堵塞测试工具,用金属纤维作过滤材料,研制成功了金属纤维防砂管。
- Applying voltage into the bushing tap method for preventive test of converter transformer value side bushing in HVDC, especially in the future for UHV, will have better practical value. 末端加压法对高压直流输电系统所用换流变压器阀侧套管预防性试验，特别是将来特高压直流换流变压器阀侧套管预防性试验具有较高的实用价值。
- preventive test at distribution transformer 配电变压器预防性试验
- non-periodic power cut preventive test 非定期停电预试
- Abstract： Throhgh analysis the failure of a CVT, some view points about maintrance and prevention test of a CVT are proposed. 摘 要 ：通过一台电容式电压互感器的故障分析，提出对电容式电压互感器的维护以及预防性试验的一些看法。
- The following procedure is not a specific recommendation. The Watts series of test kits are capable of performing any of the recognized Backflow Preventer test procedures. 下列检测程序并不是特别推荐的检测程序。美国瓦茨检测组件系列能够执行任何经过验证的防回流阀检测程序中的任何一种。
- The preventative test method is introduced for capacitive current transformer with high voltage lines in place that is proved to be practicable, high efficient and accurate. 论述了电容型电流互感器不拆高压引线预防性试验的原理和方法,并介绍了现场实际测试结果,证明该方法是准确、高效,切实可行的。
- What can we do to prevent the disease spreading? 我们能做什么来防止这种疾病蔓延呢？
- Please take some preventive medicine now. 请吃些预防药吧。
- We are testing the efficacy of a new drug. 我们正在测试新药的功效。
- We had to take preventive measures. 我们不得不采取预防措施。
- The authorities took measures to prevent tax fraud. 当局已采取措施防止偷税漏税。
- Does prison do anything to prevent crime? 采取关押方法对制止犯罪有作用吗？
- Dust the repair to prevent adhesion to outer cover. 清整修补处以防与外胎粘连。
- Stir the sauce to prevent it lumping. 把沙司搅拌一下以免结块。
- We should take steps to prevent war. 我们应当采取措施制止战争。
- They were testing a new weapon then. 当时他们在试验一件新武器。
- Preventive measures are essential. 预防手段是必要的。
