Adopt the sand-proof structure design for the whole water pump, bring down the damage to pump itself.
水泵整体采用抗沙性结构设计，降低了水井沙子对水泵的损坏程度。
The high temperature foamed ceramic with water all proof and thermal insulation has been trial - produced by using local porcelain sand and cullet.
利用地方瓷砂原料和废碎玻璃试制了具有防水、保温功能的高温发泡陶瓷。
Sand well the bag is a kind of anti - to pull the strength higher, water the well ventilated is good, and the acid-proof alkali decay with the material that the microorganism erode.
沙井袋是一种抗拉强度较高，透水透气性好，耐酸碱腐蚀和微生物侵蚀的材料。
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