你是说natural gas 不会直接致死吗？我还真是不懂。

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• yes, becasue it is CH4, not CO. the CO detector wouldn't work in -ne0987- ♀ (0 bytes) () 11/19/2009 postreply 10:28:55

• natural gas detectors are available -TexasChickenLittle- ♀ (87 bytes) () 11/19/2009 postreply 10:41:56

• what is the name of that? I tried to find one before. -ne0987- ♀ (0 bytes) () 11/19/2009 postreply 11:28:02

• see link inside -TexasChickenLittle- ♀ (156 bytes) () 11/19/2009 postreply 11:37:17

• thanks. the price is high -ne0987- ♀ (171 bytes) () 11/19/2009 postreply 11:47:16