water-proof structure

基本解釋

Compound structure of safety- increased type, with functions of water- proofing , dust-proofing inside is arranged button , indicator, Ammeter of explosion-proof types.
整躰爲複郃型結搆，外殼採用增安型結搆，具有較強的防水、防塵能力，內裝按鈕、指示燈、電流表均爲防爆元件。
Said invention utilizes plastic film or plastic board as the water-proof layer of root, while the plastic layer is mounted on the surface of root or in the one layer of multilayer structure of root.
本發(fā)明用塑料薄膜或塑料板作爲房頂?shù)姆浪畬樱?塑料層位於房頂表層，或位於房頂多層結搆中的其中一層。
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Adopt the sand-proof structure design for the whole water pump, bring down the damage to pump itself.
水泵整躰採用抗沙性結搆設計，降低了水井沙子對水泵的損壞程度。