1. For watertight bulkheads, how do you check the watertightness?
就水密舱壁而言，怎样检查其水密性？
来自互联网
2. In this paper, the design of planar antenna feed system of high-speed mobile radar and a test method for watertightness are presented.
论述了高机动雷达平面阵列天线馈电系统的水密性设计及试验方法。
来自互联网
3. Watertightness, antisepsis and do not become mildewed, do not living the characteristic of the insect, Can obstructs availably congealed, prevent the piping congelation.
具有防水、防腐、不发霉、不生虫的特性，能有效地阻止冷凝，防止管道冻结。
来自互联网
4. Watertightness, antisepsis and do not become mildewed, do not living the characteristic of the insect, Can obstructs availably congealed, prevent the piping congelation.
