... , operation more convenient and more accurate data.Adopted a triage-type sampling technique, diesel engine acceleration, deceleration, and steady speed ... absorption coefficient K and the corresponding value of filter paper-type smoke SF;High-brightness digital display;Use of "air curtain ... 1 ,RPM:10rpm, OIL TEMP:0.1°COutput mode: digital direct reading, can be attached to the printer to print the smoke ...