overprep.在 ... 的上方；遍及地；在 ... 期间adv.穿过；完全覆盖；结束；落下n.(板球中)每个投球手一次连续所投出的球数overspentvt.花费过多(开销太大；用尽)

1. Why didn't you fit a drain valve on this tank?
   这个箱柜居然没有安装泄放阀。
2. Rupture discs may only be used as a primary overpressure device in place of a relief valve with approval from SECCO.
   经赛科批准爆破膜只可用作取代泄放阀的主要过压装置。