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  1. JohnBC

    Double wall tank - Interstitial layer doubts

    Hello everyone! I'm working on a construction of a storage tank of 10,000L, this is a double wall tank and here is where I have some trouble. I can't find any information regarding the interstitial layer that shall be vacuumed. My questions are: * What is the commercial name for this...
  2. JohnBC

    Help for design a rack and pinion please.

    Hi to all, I need some help, I have to design a rack and pinion, the only two parameters that I have are: linear velocity of rack and load to be drag by rack. What criteria should I have in mind to determine the most efficient: module, pitch diameter and teeth number (in rack and pinion)...

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