E. The use of a case or Bumper that is made out of rubber or plastic may improve wireless performance by keeping your hand from directly covering these areas.
使用官方的Bumper或其他橡胶或塑料保护套可能提高无线性能，因为保护套避免用户直接覆盖这些区域。
2
In large metal molds, it is now able to produce the plastic shell mold 48-inch TV, large capacity washing machine metal mold, and the bumper, the whole instrument panel mold.