used kent 3 axis fully automatic automatic surface grinder SGS-1640AHD used kent 3 axis fully automatic automatic surface grinder SGS-1640AHD used kent 3 axis fully automatic automatic surface grinder SGS-1640AHD used kent 3 axis fully automatic automatic surface grinder SGS-1640AHD used kent 3 axis fully automatic automatic surface grinder SGS-1640AHD used kent 3 axis fully automatic automatic surface grinder SGS-1640AHD used kent 3 axis fully automatic automatic surface grinder SGS-1640AHD used kent 3 axis fully automatic automatic surface grinder SGS-1640AHD used kent 3 axis fully automatic automatic surface grinder SGS-1640AHD used kent 3 axis fully automatic automatic surface grinder SGS-1640AHD used kent 3 axis fully automatic automatic surface grinder SGS-1640AHD used kent 3 axis fully automatic automatic surface grinder SGS-1640AHD used kent 3 axis fully automatic automatic surface grinder SGS-1640AHD used kent 3 axis fully automatic automatic surface grinder SGS-1640AHD used kent 3 axis fully automatic automatic surface grinder SGS-1640AHD used kent 3 axis fully automatic automatic surface grinder SGS-1640AHD