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xflhf 发表于 2013-7-12 10:48 static/image/common/back.gif 5 ?9 y6 N( [4 F9 H8 n$ _这也叫胡乱画?谦虚过度就是骄傲
zhenglei1938 发表于 2013-7-18 18:55 static/image/common/back.gif. n" n* l+ {( _3 p6 {( O0 D- d( G2 I4 o 是外球面轴承座,丝杆用2个锁紧螺母消除轴向间隙
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