短语词组短语back -strap 后腰耳环back strap joint 贴板接合back strap width 后肩宽Back strap too high 后拉带太高;后带太高back strap length 后肩长beef back strap 牛板筋elastic back strap 弹性背垫条back strap too hellogh 后带过高Back strap distance 后带距 返回 back strap