The higher strength is, the better anti-freezing performance, but some concrete samples of high strength occurs sudden breaking in sulfate solution for freeze-thawing.
强度越高，混凝土的抗冰冻性能越好，但一些强度较高的混凝土试件在硫酸盐溶液中冻融时发生突然的中部断裂而破坏。
A newly developed high efficient degreasing and rust removing solution for pre blackening treatment of high strength bolt is presented.
根据高强度螺栓发蓝工艺的独特性，研制适用工艺要求的常温除油除锈液，在生产中应用良好。
Solution spinning of HMWPET is an important way for preparing high strength and high modulus fibers.
利用高分子量pet进行溶液纺丝是目前制取高强高模pet纤维的一种重要方法。
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