leak proof meaning in English

防漏的

Please make sure you use leak proof packing
请务必用防漏包装。
Closure flanges may be mechanically seamed or welded in place . gaskets or other sealing elements shall be used with closures , unless the closure is inherently leak proof
封闭装置凸缘可用机械方法或焊接方法洽当接合。除非封闭装置本身是防漏的，否则必须使用垫圈或其他密封件。
The 775qt series features a modular design which facilitates maintenance and assembly by retaining the spring load . check modules are threaded into the valve adapter for leak proof operation
775qt系列特点是模块化结构，通过保留弹簧负载简化维护和组装。止回阀模块通过螺纹旋进阀门适配器内，提供无泄漏运行。