All sponge rubber packing for watertight doors need to be renewed.

所有水密门的多孔橡皮密封垫换新.

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Application of low Mooney viscosity, non pollution type NBR to thin camber sponge rubber was studied.

研究低门尼粘度 、 非污染型丁腈橡胶在薄型曲面海绵胶料中的应用.

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Supply and return water pipes with sponge rubber insulation package, condensed into the nearest toilet.

供回水管道用橡胶海绵保温材料包裹, 冷凝水就近排入卫生间.风管采用镀锌钢板.

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