trace acetylene

• 乙炔

trace acetylene的用法和样例：

例句

1. Allene is an isomer of methyl acetylene.
   丙二烯是甲基乙炔的一种异构体。
2. These gauges are designed for measuring the pressure of medium acetylene.
   该压力表适用于测量乙炔介质的压力。