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This article is a study of methylene chloride as a substitute for trichloro-fluoromethane in producing flexible polyurethane foam.

讨论了用二甲烷氟三甲烷软质聚氨酯泡沫塑料的生产

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helico-, Helicobacterium, helicobasidin, helicobasidium, helicograph, helicoid, helicoidal, Helicon, helicone, heliconia,

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3G, 401(K), a,

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Unfortunately, the polyurethane foam he used is inherently unstable.

不幸的是,他使用的聚氨酯泡沫天生不稳定。

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China Daily 客集

Polyurethane foam sealant was used during construction at the first floor underground, releasing flammable gases that accumulated to reach combustible conditions.

地下一层施工作业中使用聚氨酯泡沫填缝剂时,释气体局部积聚达到可条件。

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Helicosporidae, Helicotrema, helicotron, helicrystalline, heliculture, helide, helideck, helidrome, heliencephalitis, Helienise,

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3G, 401(K), a,
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