The relation between weight mass tolerance and weighing uncertainty;

Standard weight substitution method of large-scale weighing instrument scene verification——one of the unconventional methods in weighing instrument verification;

Research into the problems of weights metrological standard about establishing standard;

Attempt for one method of verifying great weighing electronic truck scale with a few weights;

The increasingly intense fever on certificates together with the rigorous situation of employment makes considerable numbers of college students be filled with crisis awareness and in consequence,passing more certificates to add the employment weights becomes an essential trend among those students.

The mass is measured according to the substitution weighing method in the verification regulation of weights, and the uncertainty of measurement is evaluated by the uncertainty theory.

A heavy gray iron counterweight has weight of 50 t, thickness of 600 mm.

Electronic balance cannot work normally in some corporations when appraising and calibrating M1 grade poise due to big interference and unstable reading.