3257| 3
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關(guān)于膨脹節(jié)的層數(shù)問(wèn)題 |
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點(diǎn)評(píng)
在實(shí)際的工程中,多層的還是很少見(jiàn)。我是沒(méi)見(jiàn)過(guò)。
8爺能不能具體說(shuō)說(shuō) 或者能發(fā)個(gè)簡(jiǎn)單的構(gòu)造圖,
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