The internal cavity is filled with clear gel composition according to the invention, a quantity of about 8.0 ml.
向管子的内膛注入本发明之透明胶状组合物，剂量约8毫升。
Jianzui apparatus can also use percussion sheet surface, if the difference between larger business, the internal cavity.
还可以用尖嘴器具敲击板材表面，如果生意差异较大，就说明内部有空洞。
Automatic IC removal of the high pressure in the internal cavity when the valve is about to close see the working principle diagram for the details so as to ensure safety.
阀门关闭时能自动卸掉内腔高压(详见工作原理图)，保证使用安全。
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