used kent 3 axis automatic surface grinder KGS-406AHD used kent 3 axis automatic surface grinder KGS-406AHD used kent 3 axis automatic surface grinder KGS-406AHD used kent 3 axis automatic surface grinder KGS-406AHD used kent 3 axis automatic surface grinder KGS-406AHD used kent 3 axis automatic surface grinder KGS-406AHD used kent 3 axis automatic surface grinder KGS-406AHD used kent 3 axis automatic surface grinder KGS-406AHD used kent 3 axis automatic surface grinder KGS-406AHD used kent 3 axis automatic surface grinder KGS-406AHD used kent 3 axis automatic surface grinder KGS-406AHD used kent 3 axis automatic surface grinder KGS-406AHD used kent 3 axis automatic surface grinder KGS-406AHD used kent 3 axis automatic surface grinder KGS-406AHD used kent 3 axis automatic surface grinder KGS-406AHD