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watership11 发表于 2014-9-28 16:50 static/image/common/back.gif8 ?; P7 I5 {; `/ U3 V. d! s 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.gif! P/ \9 ~7 P( `* y. P1 v5 R1 K7 F 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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