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sponge rubber 海綿狀橡皮。

sponge tree

Standard specification for preformed sponge rubber cork and recycled pvc expansion joint fillers for concrete paving and structural construction 混凝土鋪面和結構建筑用預制微孔橡膠軟木和可回收的pvc膨脹接縫填料的標準規范

Specification for preformed open - cell sponge rubber pail and drum gaskets 預制開口泡沫橡膠桶和桶襯墊規范

All sponge rubber packing for watertight doors need to be renewed 所有水密門的多孔橡皮密封墊換新。