The test results with the needle-plane electrode system under ac voltage at 77 K indicate that the fatigue break in UHMW-PE under mechanical forces during the electrical treeing is a critical factor.

结果表明，机械应力下疲劳强度的劣化是低温电树枝化的重要因素。超高分子量聚乙烯具有低温性能好。

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The 137th Westminster features dogs in 187 breeds and varieties with a pair of newcomers, the treeing Walker coonhound and the Russell terrier.

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The 137th Westminster features dogs from 187 different breeds and varieties with a pair of newcomers, the treeing Walker coonhound and the Russell terrier.

WSJ: Damaged by Sandy, dog owners head to Westminster