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  • Naimesh Vadhwana, M.Sc., P.Eng. reliability engineer, Finning Canada, the world’s largest Caterpillar dealer, points to neglecting to note the age of both the oil and component being tested. “Among the most serious mistakes is not understanding the age of the oil/component,” he says. “This leads to assuming a sample is clean, but if the oil was only in service for a few hours (i.e., three to four hours instead of a few shifts) the contaminants do not show up. Conversely, when the sample duration is two to three times the normal change interval, extra contaminants can show up, leading one to believe the sample is worse than it really is. Oil in a new component (first change) may still have assembly grease/oil in it leading to elements from the assembly process being flagged; an older component may be breaking down (or closer to failure) than a newer component so the oil might be expected to show more contamination.”
  • $ sudo fdisk /dev/sdc
  • 关闭  股票的量比是什么意思?量比作用是什么
  • 思维方式即这四种投资理念的具体思考与应对。举个例子,我如果属于第一种投资理念,那么我的思维方式大概率是跟风式的、碎片化的。
  • 不建议买长期的国债逆回购哦,因为一旦成交,你的钱会锁定很长时间。国债逆回购特别适合用股票里的闲置资金去操作,其次呢建议大家在合适的时机买入,薅羊毛也是有技巧的。
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