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０引言裂缝是指混凝土制品在应力状态下产生的细微缝隙。裂缝对制品的抗渗性和耐久性影响尤为显著，根据制品用途的不同，使用时对裂缝宽度的限制要求也不同，裂缝的制品在某些情况下甚至不允许使用，所以我们在制品的生产、运输、使用过程中尽量避免裂缝的产生。１产生的...
0 INTRODUCTION Cracks refer to the minute gaps that concrete products produce under stress conditions. The effect of cracks on the impermeability and durability of the products is particularly significant. According to the different uses of the products, the requirements for the restriction on the width of the cracks when using them are also different. The products of the cracks are not even allowed to be used in some cases, so we are manufacturing the products. Avoid cracks during transportation, use, and use. 1 produced...