Awọn ẹya:
1. Ilana naa rọrun, itanna hoist le jẹ iṣakoso latọna jijin tabi iṣakoso nipasẹ okun waya, eyiti o rọrun lati ṣiṣẹ.
2. Apo ṣiṣii ti afẹfẹ ṣe idilọwọ eruku fò, mu agbegbe ṣiṣẹ ati dinku awọn idiyele iṣelọpọ.