water-gas welding液压焊;水煤气焊
water drive gas reservoir水驱气藏
Water Power Gas Bills水
Water and gas charges水费
Water boiling gas appliances燃气沸水器
Drinking Water Or Gas饮用水和气体
water or gas mains水总管
Water and gas tracers水和气体的示踪剂
separate water in gas气水分离
N（名词） a mixture of hydrogen and carbon monoxide produced by passing steam over hot carbon, used as a fuel and raw material 水煤气 → see also producer gas