Normally, the cumulated water in top cover is drained to cumulated water well by gravity drainage, in emergency situation, thewater would be drained by the self-priming pump installed in gallery.
顶盖内积水正常情况下通过自流排水排至积水井，紧急状态下通过装在廊道内的自吸泵排水。
2
The preparing, performance and upgrading by epoxy resins of priming paint coating of iron and steel of water-solubility acrylic are discussed in this paper.
本实验论述了水溶性丙烯酸钢铁底漆涂料制备、性能以及用环氧树脂对其进行改性。
3
In general, a foot valve can be mounted if the pump is mounted above thewater level of thewater inlet so as to start the pump with priming, it can also use the way of vacuum pump water leading.