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  1. mobster1930

    Delay element problem

    I hope this it the right subforum for this topic, forgive me if it's not. I work in in the mining detonator industry and we have a problem with our delay element. The delay composition is made out of 60% Pb3O4, 30% Si and 10% Sb2S3. This delay composition for detonators has a delay of 500ms...
  2. mobster1930

    Styrofoam and static electricity

    Can styrofoam as a material be used in rooms where particles of initial explosive are floating in air? Can styrofoam cause an explosion in that space because of eventual static electricity in it (in styrofoam) ?
  3. mobster1930

    Backward extrusion

    What type of steel is the best for making die used for backward extrusion of copper?
  4. mobster1930

    Rotation of small plastic tubes

    How could I rotate small plastic tubes (sealed on one end), all in one direction ? They're 65mm long, diameter 8mm and their sealed end is 1mm thick. These tubes must be fed vertically into a machine for montage with their sealed end facing towards the floor. I've attached 2 pictures of this...

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