If the pressure is not reduced, the cylinder is likely to fracture.
如果不降低压力，汽缸就可能破裂。
And two products of the fracture is not the same.
而且两种产品的断口也是不一样的。
Objective To compare the resistance to fracture of the root canals after instrumentation or not.
目的比较预备与不预备的根管以及预备后充填与不充填的根管抗折力。
In a closed or simple fracture, the skin is not broken.
在一个封闭的或简单的骨裂，皮肤也不折断。
In a closed or simple fracture, the skin is not broken.
在一个封闭的或简单的骨裂，皮肤也不折断。
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