樓主: jingmiao
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我來(lái)湊興出個(gè)趣味題,這是以前我們得到美國(guó)訂單的一個(gè)圖紙 |
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點(diǎn)評(píng)
粗糙度分去除材料跟不去除材料兩種,前者是車(chē)、銑、磨、刨等工藝,后者是鑄造、熱軋、冷軋、鍛造等工藝,前者粗符號(hào)為三角,后者是小圓,這是常識(shí)...
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