短語(yǔ)詞組短語(yǔ)recoil proton proportional counter 反沖質(zhì)子正比計(jì)數(shù)器hydrogen recoil proportional counter 氫反沖式正比計(jì)數(shù)器proton recoil proportional counter 質(zhì)子回跳比例計(jì)數(shù)器 返回 recoil proportional counter