Ang XCMG 700 Excavator ay nilagyan ng braso ng rock na Kaiyuanzhichuang, na maaaring matugunan ang anumang hamon.
Kaiyuan Rock Arm, as a multi-purpose modified arm, is suitable for mining without blasting, such as open-pit coal mines, aluminum mines, phosphate mines, sand gold mines, quartz mines, etc. It is also suitable for rock excavation encountered in basic construction such as road construction and basement excavation, such as hard clay, weathered rock, shale, rock, soft limestone, sandstone, etc. It May magagandang epekto, lakas ng mataas na kagamitan, mababang rate ng pagkabigo, kahusayan ng mataas na enerhiya kumpara sa pagsira ng mga martilyo, at mababang ingay. Ang braso ng bato ay ang unang pagpipilian para sa kagamitan nang walang mga kondisyon ng pagsabog.