1. Drain the wound (of blood )before you apply the bandage. 先挤出伤口中的血尔后包上绑带。
2. Available in situations of overheat high pressure and small duty for auto draining. It cna prevent tempering steam from leakaging. 该阀适用在过热、高压、小负荷恶劣工况下的自动阻汽疏水，有效地阻止过热蒸汽泄漏。
3. The gold mine discharges tailings massively every day, which results in gold and useful metal draining, simultaneously brings the enormous harm to the environment. 黄金矿山的尾矿每天大量排放，造成金及有用金属的流失，同时对环境带来极大的危害。
