The exact number of natural environmental factors and induced environmental factors that exist on the earth ’s surface and in atmospheric space cannot be counted at present. There are dozens of factors that have a greater impact on the use and life of engineering products (equipment). Engineers engaged in the research of environmental conditions of engineering products summarize the environmental conditions induced by the existence of nature and human activities into a series of test standards and specifications to guide the environmental and reliability tests of engineering products.
For example, GJB150—the national military standard of the People ’s Republic of China “Environmental Test Methods for Military Equipment†that guides military products to conduct environmental tests, and GB2423—the national standard of the People ’s Republic of China— “Guidelines for Environmental Test Methods of Electrical and Electronic Products†that guide electrical and electronic products to conduct environmental tests.
Therefore, the main basis for our selection of shaker and reliability test equipment is the test specifications and test standards for engineering products. Secondly, in order to standardize the tolerance of the environmental test conditions in the shaker and ensure the control accuracy of the environmental parameters, the national technical supervision agency and various industrial departments have also formulated a series of verification procedures for shakers and testing instruments.
Such as the People's Republic of China National Standard GB5170 "Electrical and Electronic Products Environmental Test Equipment Basic Parameter Verification Method", and the JJG190-89 "Vibration Table System Trial Verification Regulation" promulgated and implemented by the National Technical Supervision Bureau. These verification procedures are also an important basis for selecting environmental and reliability test equipment. Test equipment that does not meet the requirements of these verification procedures is not allowed to be put into use.
2-in-1 Dual Spiral Hair CurlerThe twisted plates include micro guide combs that secure hair onto the plate to prevent it from slipping while you twist and curl.
HEAT RESISTANT MAT INCLUDED-Silicone mat can wrap the curling iron hot part or just put the heated tools on the mat to protect your counter from heating damage..
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2-in-1 Dual Spiral Hair Curler
Air Curler,Magic Curlers,2 In 1 Curling Iron,2 In 1 Straightener And Curler
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