詳細規格及用途描述 WT-302AS - Capacity: 200 LBS/90 KGS, Gear Ratio: 3:1 WT-304AS - Capacity: 400 LBS/180 KGS, Gear Ratio: 3:1 WT-306AS - Capacity: 600 LBS/270 KGS, Gear Ratio: 3:1 WT-308AS - Capacity: 800 LBS/360 KGS, Gear Ratio: 3:1