Ball joint housing is an outer ring of radial spherical plain bearing, made of zinc base alloy.
球头座为向心关节轴承的外圈，由锌基合金制成。
youdao
That shop is plain a clip joint!
那家商店纯粹是在敲竹杠。
应用推荐
模块上移
模块下移
不移动