| 摘要 |
<p>PURPOSE:To provide a constitution in which generating a defect can be suppressed while ensuring sufficient strength of a piston. CONSTITUTION:A pipe-shaped strength member, having a slide surface slid in a cylinder hole internal surface in the periphery to further inject a resin from an opening by closing one end side and closing the other end side into the inside of a resin part 160 mixed with a glass fiber and further to provide a through hole 161b opposed to large diameter parts 16a, 16b, is integrally molded.</p> |
