... , 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/connector/joint etc. Material: alloy steel, casting iron, ...