单项选择题
A、R22 B、氨 C、R134a D、R11
A、R22 B、R123 C、R134a D、R152a
A、R22 B、R407c C、R134a D、R123
A、氨 B、水 C、氯化钠 D、氯化钙
微信扫一扫,加关注免费搜题