The rigid cover plate is provided with two grout holes.
刚性盖板设置两个灌浆孔。
Perishables are stacked on deck under cover, awaiting rigid inspection before they are struck below.
易腐物品已经覆盖起来堆放在甲板上，等经过严格的检查后再搬下船舱。
Tensioned membrane structures is made of soft fabric and clenched by flexible cables or rigid supports to produce stiffness and cover a large space.
张力膜结构是一种以性能优良的柔性织物为材料，利用柔性钢索或刚性支承结构将膜面绷紧，从而具有一定刚度、能覆盖大空间的结构体系。
The filter box 22, airflow grate 22a and arcuate-shaped cover 20 are preferably constructed of a generally rigid, molded polymeric material.
过滤盒22，气流栅22a和弓形外罩20优选地通常由硬模塑聚合物材料构成。
The filter box 22, airflow grate 22a and arcuate-shaped cover 20 are preferably constructed of a generally rigid, molded polymeric material.
过滤盒22，气流栅22a和弓形外罩20优选地通常由硬模塑聚合物材料构成。
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