اختبار معدل تدفق ذوبان مواسير البولي إيثيلين Melt mass flow rate
فكرة الاختبار يتم تعريض العينات لدرجة حرارة 190 درجة ووزن 5 كجم وقياس معدل ذوبانها كل 10 دقائق بحيث لا يتجاوز -+ 20 ٪
How Are Highways Designed?
Exploring the relationship between speed, safety, and geometry of roadways. Get a $25 credit when you sign up at https://ift.tt/3gws7Cy Although many of us are regular drivers, we rarely put much thought into roads. That’s on purpose. If you’re thinking about the roadway itself at all while you’re driving, it’s probably because it was poorly designed. There are so many factors that go into highway safety, many of which are more philosophical or psychological than pure physics and engineering. But to a certain extent, highway design is an art form. -Patreon: https://ift.tt/27tcvqH -Website: https://ift.tt/1Th3U0B Writing/Editing/Production: Grady Hillhouse Editing and Direction Help: Wesley Crump This video is sponsored by Ting.
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