氮中甲烷、乙烷、乙烯、乙炔、丙烷、丙烯、正丁烷、异丁烷、正丁烯、异丁烯、顺丁烯、反丁烯、正戊烷、异戊烷混合气体标准物质
Nitrogen methane, ethane, ethylene, acetylene, propane, propylene, n-butane, isobutane, n-butene, isobutylene, maleic, antibutene, n-pentane, isopentane mixed gas standard substance
