| The bridge inflatable mandrel of Zaoqiang Yuanheng bridge parts Factory is a kind of cylindrical bag that can expand and shrink. It is made of rubber and fiber reinforced layer vulcanized and has high tensile strength, elasticity and air tightness. It is used to form the cavity of concrete member. It has enough strength to withstand the pressure of concrete after inflating and expanding. It can replace the original wood mold, bamboo mold and steel mold. When opening the valve, the air bag shrinks and can be withdrawn from the cavity. |
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