ZZ Series hydraulic shield support bracket bracket good stability, the top beam rear end supporting force, with a strong cut top performance, stand a good attitude control operation on the hard roof, roof cycle pressure was significantly geological conditions or strong adaptability . Model bracket height m working resistance KN supporting strength MPa Bottom pressure MPa goes step mm ZZ3200/14/32 1.4-3.2 3200 0.92 2.11 700 ZZ4000/17/37 1.7-3.7 4000 0.73 1.823 700 ZZ4400/16/28 1.6 -2.8 4400 0.87 2.23 700 ZZ7600/22/34 2.2-3.4 7600 1.18 3.1 700