If the medium is coal gas, the type of coal gas shall be explained, such as city gas, coke oven gas,

中文解释

如果是煤气，要说明是何种类型煤气，例如城市煤气、焦炉、转炉、高炉煤气等。

正在查询

occupy oneself in liquescent enacted clannish cavalierness pct 枪管 demarcation 复旦 compiler