发布时间:2025-01-19 08:09:09
CA属于陶瓷砂轮,CBN属于金刚石砂轮分为陶瓷、树脂、金属结合剂,磨削的工件及磨削效率都不同
你好我买了一台九阳电炖锅jyzsm3505为什么熬中药3碗水的量6个小时了还不沸腾
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