基本解释[经济学]正比硼计数管词组短语短语proportional boron -lined counter 正比涂硼计数管boron trifluoride proportional counter 三氟化硼正比计数管boron deposited proportional counter tube 硼沉积正比计数管proportional boron counter更多词组专业释义经济学正比硼计数管