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1·Besides, the jacket is made of flexible plastic which is unshrinking after being heated.

护套采用受热后不收缩的软塑料制成。

2·Effects of electrolyte of different kind and concentration on the viscosity, gel strength, viscoelasticity and unshrinking ability of carrageenan were studied.

研究了电解质的种类和添加浓度对卡拉胶的粘稠性、凝胶强度、粘弹性和持水性等的影响。