住友SH460-SH450挖掘机回转支承/大齿圈/大转盘加藤HD308-HD512-HD770-HD820挖掘机回转支承/大齿圈/大转盘加藤HD1023-HD1430-HD2045挖掘机回转支承/大齿圈/大转盘玉柴挖掘机回转支承YC35-Y***5-YC50-YC55-YC60-YC85-YC135)