A.水澆 B.掃帚撲打 C.濕物覆蓋 D.蒸氣吹
A.0.1~2 B.0.1~0.2 C.0.4~0.8 D.1~0.2
A.射吸式焊炬和高壓式焊炬 B.射吸式焊炬和等壓式焊炬 C.射流式焊炬和等壓式焊炬 D.虹吸式焊炬和負(fù)壓式焊炬