The lower flammability limit for the vapor is 5% in air.
给蒸汽的更低可燃性限度是空气的5%。
lower flammability limit of methane
沼气成分燃烧下限
lower flammability limit
发火下限
Leaks in a confined area can cause acetylene to collect and readily attain concentrations above the lower flammability limit of 5 percent acetylene in the air.