| Explained: The noise low - strength is strong, works for 8 hours not to give off heat - the special steel quality of material lightly, thermostable, the plasticity to be strong, and the antimagnetic ability strong characteristic, causes a model community machine stabler work, specialized model community teacher first choice: Frequency 25000 revolution of - - 30000 revolution of 1 minute operating instructions: Starts 5V normally the 7-9V normal work |
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