1. When the diamond saw blade is being selected, the applicable materials to be processed shall be definite.

2. Before the diamond saw blade is installed, the pollutions adhering between saw blade and flange shall be removed; When installing the diamond saw blade, the marked direction shall be kept consistent with the rotating direction of electric tools, and the flange shall be fastened by spanner attached to electric tools.

3. Do not use any diamond saw blade that has been deformed for being pressed of crashed.

4. When operating, the operator must wear safety helmet, safety footwear and goggles, protective glove, additionally. If necessary, the operator must use earplug, mask and so on.

5. All the electric tools shall have protective cover.

6. Before operation, the operator must confirm that no other irrelevant person is at site.

7. Cutting operation shall be started after the diamond saw blade sufficiently rotated. First cut slowly, then normal cut it after operation stabilized, excessive force or curved cutting is prohibited。

8. When cutting,do not stop the diamoond saw blade's rotation.

9. Do not touch rotating diamond saw blades by hand.

10. Before changing the diamond saw blade, turn off the power of electric tools and poll power plug out from the outlet.