Working stock and the working fluid is simultaneously weighing formulated, and the stability of the stock solution is adopted, to prove the accuracy of the weighing standard is no problem
The work stock and the working fluid are simultaneously formulated, and the stability of the reserve liquid is passed, proving that the measurement accuracy of the standard product is not a problem
The working stock solution and working solution are prepared by weighing at the same time, and the stability of the stock solution is passed, which proves that the weighing accuracy of the standard is no problem<br>