The temperature cycle of the high and low temperature impact test chamber is to expose the test sample to the predetermined high and low temperature alternating test environment. To avoid the impact of temperature shock, the temperature change rate during the test must be less than 20 ° C / min. At the same time, in order to achieve the effect of creep and fatigue damage, it is recommended that the test temperature cycle be 25 ° C to 100 ° C, or a cycle test of 0 ° C to 100 ° C may be used according to the application of the product, and the exposure time is 15 minutes each.
Environmental Stress Screening Test (ESS = Environmental Stress Screening): The application of environmental stress to the product prompts the early exposure of potential defects in the product to be eliminated as soon as possible. ESS is not an accelerated reliability test, which is mainly applicable to the reliability screening test of finished products.
Comparison of temperature shock test and temperature cycle test Various test purposes and environmental conditions: Purpose Accelerated stress test Accelerated life test Environmental stress screening test (ESS) test standard MIL-STD-202Method107IEC60749-25 JEDECJESD2
The hand is the second face of a woman, from the hand can judge a woman's identity, cultivation and life quality. If you don't care carefully, others will see the signs of time from your hands. And the foot is a microcosm of the human body, and more and more people have been working with facial care.
We only have very few sebaceous glands on the backs of our hands, so it's easy to dry out, and it's a smart woman's idea to keep hand cream handy. Apply it every time you wash your hands to replenish moisture and nutrients. You can use all the high-quality hand protection products that are commonly available on the market. This does not mean that you can use them freely. If the back of the hand is tight and there are small fine lines, it is necessary to choose mild products, such as those containing glycerin, mineral oil, lanolin and other moisturizing ingredients. If you find yourself with itchy, peeling skin, look for products that contain soothing ingredients like mint and chamomile and moisturizing ingredients like minerals and glycerin. The best time to care is also in the evening, before going to bed with almond cream hand cream, then wear a pair of thin plastic gloves, better for the skin to absorb nutrients.
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