I believe that everyone will have experiment classes when they are young, especially in chemistry experiments. We will all use balances. We use standard weights to weigh the objects on the other side of the balance to carry out the next step of the experiment. Then, when using balances and standard

The strength test checks the program's resistance to abnormal conditions; it checks whether the performance degradation of the system is within the allowable range when the system is operating under extreme conditions.Strength test:Stress testing always forces the system to operate under abnormal re

The magnetic force of the weight in the measurement process will have a negative effect. This is because this force cannot be distinguished from gravity in mass measurement. Magnetism can not only cause the interaction between two quality standards, but also the interaction between quality standards

Single E1 and E2 weights. Special steel linear weights, from 1mg to 500mg, non-magnetized, with a density of 8.0 g/cm3. Packed in a plastic box for easy storage.Flake weights: F1 weights are made of aluminum or nickel silver. Aluminum sheet weights range from 1mg to 5mg, with a density of 2.7 g/cm3.

Single E1 and E2 weights. Special steel linear weights, from 1mg to 500mg, non-magnetized, with a density of 8.0 g/cm3. Packed in a plastic box for easy storage.Flake weights: F1 weights are made of aluminum or nickel silver. Aluminum sheet weights range from 1mg to 5mg, with a density of 2.7 g/cm3.

According to the quality tolerance and measurement uncertainty, the weights are divided into ten types of stainless steel weights such as first class, second class, E1, E2, F1, F2, M1, M11, M2, M22, etc., according to JJG99-2006 ((weight 》Verification rules, ABBA and ABA cycles are usually used when