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watership11 发表于 2014-9-28 16:50 static/image/common/back.gif4 Q3 X0 ?0 U( b3 Q9 b 做成可涨的管体,给压膨胀,松开缩小!
小人物~ 发表于 2014-10-3 08:54 static/image/common/back.gif6 V' c+ q& c" u1 q0 p* D7 `7 ]. r 我刚开始也想的将芯棒做成涨开、收缩的。但该件内壁要求光滑。
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