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The battery has positive and negative electrodes, and the metal caps are the contact. The positive electrode is a convex surface, and the negative electrode is a concave surface. The battery cover is a channel of battery electrical energy, and its power is high, and the commonly used materials are lead materials, and the like.
http://www.gingermco.com/metal....-stamping/battery-st

  • Aimer
  • Amour
  • HaHa
  • Sensationnel
  • Triste
  • En colère