... weighing ,high produciton efficency concrete batching plant with patented technology of subtraction weighing batching system (Patent No.200920088246. ... 3),with high precision, compact design, land area needed is smaller, low investmenthigh producing efficency, low ... of high quality ready-mixed concrete. The main types of plant HZS50K, HZS75K,HZS60A, HZS90A/ ...