Dzanja la Kaiyuan Intellectual Property lophatikizidwa mu Hitachi 870 lidapangidwa kuti lizigwira ntchito modabwitsa, kuwonetsetsa kuti kuthyola miyala ndikothandiza kwambiri kuposa kale.
Rock Arm of Excavator, ngati mkono wosinthika wamitundu yambiri, ndi yoyenera kumigodi popanda kuphulika, monga migodi ya malasha otseguka, migodi ya aluminiyamu, migodi ya phosphate, migodi ya golide ya mchenga, migodi ya quartz, etc. Ndiwoyeneranso kukumba thanthwe zomwe zimakumana ndi zomanga zomanga monga misewu yomangamanga ndi migodi yapansi, kukumba miyala yapansi, miyala yamchenga yofewa, miyala yofewa, miyala yamtengo wapatali, miyala yamtengo wapatali, miyala yamtengo wapatali, miyala yamtengo wapatali. etc. Iwo ali ndi zotsatira zabwino, mkulu zida mphamvu, otsika mlingo kulephera, mkulu mphamvu dzuwa poyerekeza kuswa nyundo, ndi otsika phokoso. Rock Arm ndiye kusankha koyamba kwa zida popanda kuphulika.