It is used to test and burette, graduated pipette, single-marking pipette, single-mark volumetric ... ) is suitable to the standard of JJG 196. It is used to test and burette, graduated pipette, single-marking pipette, single-mark ... countertops, and stainless steel stents; 2. Using water resistant plexiglass bench, and high quality glass beams and the piston; 3. With ...