The first is to see whether there is a significant distortion of aluminum, the surface is smooth, there are no cracks or boldness pointer pattern aluminum, scratches, burrs place, if you find any, it is best not to buy. Second, is to carefully check whether the color of the aluminum surface has different shades of color Jinan pointer pattern aluminum, have a color that shows the quality, but off. Of course, the same model can also put together profiles were compared, of course, if the color is best not to buy too obvious. To check whether the thickness of aluminum sections and marked with the same model. Finally, with a smooth hard object to scratch at the surface of aluminum, will leave a white scratches, aluminum wipe gently and observe, if you can not wipe off, indicating that the material may have quality problems, but if the opposite You can easily wipe off, indicating that the surface of the oxide film thickness profiles are qualified. Notes aluminum drilling a borehole, first, before drilling, we have to choose the right drill bit. Because aluminum materials are relatively soft, and has great sticky, so the best choice when selecting drill screw tap drills. Case 2, when drilling aluminum, because the intensity of the drill machine is relatively large mouth, directly on the aluminum drilling, drill into the bottom of a direct pointer pattern aluminum factory in Jinan, is prone to broken taps and aluminum internal tooth decay occurs leading aluminum diamond buckle aperture is too large. Third, when the drilling machine drilling Shandong pointer pattern aluminum, will produce relatively large shock force, so that the requirements of the staff must grasp the intensity, holding his hands to steady drilling machine, if it shakes the hands of case, it is the diameter of the hole is too large prone. Especially with M3 tap, because this tap is very thin, so when the construction to be extra attention. Pattern aluminum pointer professional manufacturer pointer pattern aluminum, aluminum rolls provided by Jinan Heshun Aluminum Limited. Jinan Heshun Aluminum Co. (www.jnhsly.com) is a professional, "aluminum, aluminum, aluminum, aluminum rod, aluminum row, aluminum, aluminum, aluminum elbow" of the company. Since its inception, we adhere to the "good faith, sound management" approach, the courage to participate in healthy competition in the market, so that the "aluminum, aluminum, aluminum, aluminum coil, aluminum rod" brand has a good reputation. We adhere to the "service first, customers first" principle, so that cis Alcoa won the trust of customers in all aluminum products, and establish a good corporate image. Special Note: This information is for reference pictures and information, please contact us to obtain the most accurate information, thank you!