退出可食用
发表于 2025-3-23 16:58:33
The casting of metals,The production of metal objects by the process of casting has been practiced for thousands of years. This is probably the quickest, and most economical way of producing a metal component, particularly a large and complex one.
抱负
发表于 2025-3-23 20:59:03
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天文台
发表于 2025-3-23 23:54:24
The transmission of power,A working machine is composed of many parts, some of which are moving. There are many kinds of motion, of which . and . are amongst the most important. In rotatory motion, the object is rotating round an axis or a point, in a clockwise or an anticlockwise sense.
贵族
发表于 2025-3-24 05:01:32
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影响带来
发表于 2025-3-24 08:58:51
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清楚说话
发表于 2025-3-24 12:54:13
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说明
发表于 2025-3-24 15:10:09
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四牛在弯曲
发表于 2025-3-24 21:12:02
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饮料
发表于 2025-3-25 01:58:38
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发展
发表于 2025-3-25 04:25:39
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