National standard for polyethylene (PE) pipes for water supply
7, experimental method "br"
Zhou Yiguang zyg_ Awp@ piston stroke (mm) 200 should be analyzed by differential thermal analysis. In the whole process, the carbon black content of the instrument
7.1 the state adjustment of the sample and all instruments that verify the quality or performance can be called the standard environment for Junping experimental machine test "br"
according to the provisions of gb/t2918, the temperature is 23 ℃ ± 2 ℃, and the state adjustment time is 24h. If it is specified in the test method standard, the test method standard shall be followed. Br
7 park bench 2 color and appearance "br"
observe with the naked eye