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藥廠要設(shè)計(jì)一個(gè)機(jī)械開關(guān)閥門,,要帶記時(shí)功能 |
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點(diǎn)評(píng)
同意這個(gè)觀點(diǎn),既然都不能用電了,,用什么驅(qū)動(dòng)呢,?齒輪也不是會(huì)自己動(dòng)的,加一根驅(qū)動(dòng)軸,?那不是更不潔凈了嗎,?
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