煤气制造工厂 gashouse
煤气制造记录簿 gas-making log book
煤气和焦炭制造 coal gas and coke manufacture
欧洲煤气表制造联合会 FACOGAZ
煤气可用煤来制造。
大型高温蝶阀采用钢板焊接制造，主要用于高温介质的烟风道和煤气管道。
The use of large-scale high-temperature steel welding butterfly valve manufacturer, mainly for high-temperature medium duct smoke and gas pipelines.
如果特别指定，这些阀门可以采用下列合金钢制造，适用于蒸汽、水、油、油气、煤气和通用应用。
When specified, the valves are available in the alloys shown below which are suitable for steam, water, oil, oil vapor, gas and general services.
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