... Hydraulic decoiler:a. Main structure: it is composed of steel plate, four arc steel plate, slide block, main shaft, side board, ... 3) Hydraulic system:a. Main structure: it is composed of steel oil receiving case, oil pressing valve with 200kgs capacity, ... of various hardware, electrics, electric appliances, toys and auto parts; precise and wearable 6) Customers are welcomed to place orders for special ...