Adjustable seat back angle 5 positions -可调节5个角度的靠背,满足不同
Back angle quadrant 背角量角器
Back angle level 背角水平仪
By changing the fixed knife material , adding spacer , repairing the moving knife front and back angle , transforming the casting bond into double one , the effects were obvious 通过更换定刀材质,加放垫片,动刀修复前后角,改为双铸带头等后,效果显著。