... : round anchor, flat/slab anchor, circle anchor, P-type / H-type dead anchor, coupler, duct and ... couple, mono/multiple prestressing jacks, oil pump power pack, swaging machine etc. Components: anchor head ... /plate/ring, 2/3pcs grips/wedges, block/backing/base/bearing plate, spirals, steel/plastic duct/pipe/tube/couple, coupler ...