开关可以安装在异径三通管，标准三通管或焊接管件上。
Flow switch can be installed in a reducing tee, standard tee or welded fitting.
并以实例说明焊接管材与功率等的定量关系和设计计算过程。
Thevelationship between pipe size and welding power and design program are analyzed.
并以实例说明焊接管材与功率等的定量关系和设计计算过程。
Thevelationship between pipe size and welding power and design program are analyzed.
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