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ʱ:2021-02-20 14:59 Դ: ת:Ѷ
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֮վĹؼͿиװ();ԼԵȡۺԷΪɫͽࡣΪرγҪ󣬽ᣬڶῪչо᳧˹ȫͿϡԲͬɫĵɫͿӡ


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׵ƵĹϵ

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㷺ʹõĶ©ᡣ䷽ٸϩӲƳõֹʴЩصӦ÷㣬㹻ճԺȥͨϴѭǶԼѭĿԲǿһֵĸԺĸʱ䣬ͿҪ30-40ӣDZΪ϶Сֵƺ󣬽ȥƤܼѧȥͨڵڽʱȥᡣ죬ᣬὫرȥ


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ǹƶٶһߵֱΪݡΪͬͿշߵֱDzͬģͨȡѹǰߵ30%~50%С30%ǹƶٶȷҪ빤תٶƥ䣬ʹÿͿͿȴﵽҪһͷǹƶٶȻǹ빤ٶȵ죬ζŵλʱڣǹɨĶٻÿͿĺȣ̩ᣬԵǹƶٶʵǿÿͿĺȡÿͿĺȲ̫һ£ʹú0.15 mmµıͿ㣬γᣬÿͿͿȲҪ0.02 mmͿ죩ǹƶٶȶԹҲӰ죬Ϊʹֲ߶ȱλӦ󣬿ɲȡ߹ٶȵķӿǹƶٶȡ


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