Sections less than about 8 mm in thickness will harden through.
区段比较少量比较大约厚度的8毫米将会变硬过。
After several hydrothermal synthesis steps, a dense intergrown zeolite crystal layer about 15~20 mm in thickness was formed on the outer surface.
重复合成5次后，在载体表面形成一层致密、连续的沸石晶体层。
In the bark of tapped trees, the thickness of the conducting phloem is less than 1 mm.
在割胶树的树皮中，有输导功能的韧皮部的厚度不超过1毫米。
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