He aha ka pulley? ʻO ka pulley he mea mīkini maʻalahi a mīkini paha (hiki ke lāʻau, metala, a i ʻole ka plastic) e komo pū me ke kaula hiki ke hoʻololi, ke kaula, ke kaulahao, a i ʻole ke kāʻei i lawe ʻia ma ka lihi o ka huila. ʻO ka huila, ka mea i kapa ʻia he puʻu a pahu paha, hiki i kekahi ...
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