4906| 24
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請(qǐng)教:關(guān)于小麥播種機(jī)鏈傳動(dòng)所需功率的問(wèn)題 |
評(píng)分
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點(diǎn)評(píng)
我i覺(jué)得自身重力帶的的阻力要另加上來(lái)的,而且土地情況不一定。要放大點(diǎn)的系數(shù)。
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