The belt started wrapping up on the tractor pulley. 皮帶開(kāi)始繞在拖拉機的皮帶輪上。
Some experiments revealed that the electric motor might be a little weak for this purpose, but I still can try a smaller belt pulley. 一些實(shí)驗表明電動(dòng)機可能有點(diǎn)弱為此目的，但我仍然可以嘗試較小皮帶輪。
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