No. A 1 Building 1, Chebei Longkou Industrial Zone, Zhongshan Avenue, Tianhe District, Guangzhou, can be marked with a frame number. Address: Building A 1, Chebeilongkou Industrial Zone, Zhongshan Avenue, Tianhe District, Guangzhou. Marking Machine Metal Engraving Machine Pneumatic Marking Machine Computer Engraving Machine Marking Machine Factory Pneumatic GZMQ 12 12JYH Marking Machine ... Portable marking machine pneumatic marking related products. The extraction method of frame number rubbings is as follows: clean and dry the frame number position, and then evenly smear it on the frame number with red ink. Glue the frame number with transparent glue. Press evenly with a towel, tear off the adhesive and stick it on white paper. Finally, just cut the number of frames. Then rub it into a ball with newer carbon paper and wipe it back and forth on the plane where the engine number is located. Stick the rubbing film on the engine number, scrape it in one direction with a smooth tool until the number is clear, and finally remove the rubbing film and stick it on the document.