令人神往! (輸油管為什麽要做成彎彎曲曲的呢? 不太明白.)
所有跟帖:
• 也不太懂,猜想是否跟熱脹冷縮和安全有關。 -看風景- ♂ (0 bytes) () 04/03/2015 postreply 20:13:59
• 也不太懂,猜想是否跟熱脹冷縮和安全有關。 -看風景- ♂ (0 bytes) () 04/03/2015 postreply 20:13:59
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