water pump drain plug 水泵放水螺塞
She pulled out the plug and let the water drain away.
她拔起塞子放掉了水。
Pump shaft seals use mechanical seal, pump top and bottom, respectively, equipped with water injection plug and the drain plug.
泵的轴封采用机械密封，泵体顶部和底部分别装有注水、放泄的螺塞。
Pull (out) the plug and let the water drain away.
她把浴缸的塞子拔掉，脏水流走了。
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