PURPOSE: To simplify the manufacturing stages by sintering and bonding an alloy filled into screw holes in a cylinder barrel along the insides of the holes with a hot hydrostatic press.

CONSTITUTION: A pair of parallel and adjacent screw holes are pierced in a cylinder barrel 4 made of a monolithic steel material, and hollow cores 10, 10a are concentrically placed in the holes. A wear or corrosion resistant alloy is filled into the gap 9 between the cores 10, 10a and the barrel 4, and it is sintered with a hot hydrostatic press. An alloy layer 5 of a uniform thickness is bonded to the barrel 4 to obtain a rough body for a multi-shaft cylinder. By this method, the manufacturing stages are simplified, and the corrosion or wear resistance is improved.