SGD型钢制套管伸缩器基本尺寸SGD(A)-ZH62、HT、JH-10公称通径mm最小长度mm安装长度mm最大长度mm401702002105017021022080225240305100230270310150250290330200250290330250260300360300260300360350260300360400260300360450290370390500320370440600325370445700375420495800385440510900390440520100035044047012003253604451400450525600160045052560018005606357102000600675750