送 锐力马旗舰店U儿 气动 角磨机 打磨·切割·抛光 QL:503 ULEMA STABLE AND SUSTAINED POWER IT'S BETTER TO KEEP SCREWING HIGH-PRECISION CNC QUALITY MANUFACTURING PROCESS AFTER QUENCHING AND HARDENING TREATMENT.IM PROVE DURABILITYEASY YINGD 强劲动力 2寸角磨机 终身维修