thread appearance and quality, electroplating quality, flow, sealing strength, the sealing strength, the valve body strength. Lock: The main indicators for the opening rate and corrosion resistance. Crack rate: the number of times to open and try to open the percentage of the total number of single row of balls �� 0.204,
double row of balls �� 0.051; Corrosion resistance: metal coating and chemical treatment layer should be corrosion-resistant test, exposed surface in accordance with its matrix and coating type To determine the test time, the end of the test to assess the corrosion resistance level. 5, laminate flooring, solid wood flooring and solid wood flooring wear.
laminate flooring for 6000 rpm without damage; solid wood flooring and solid wood flooring for 100 turn, check the amount of grinding, while no damage, the standard report corresponding Formaldehyde emission: strengthen the wood flooring, solid wood flooring should have formaldehyde emission indicators, the standard �� 1.5mg / L,
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