液压拉马系列参数拉顶力吨工作行程mm***低高度mm拉爪有效直径mm手柄操作力kgf1.57013020-18032310017020-24032511017025-30032814024035-350321014024040-380321616025050-400322017026050-4503232180270100-5003250190280150-50032100200290150-60032)