Q: How powered samples could be treated?
  如何处理粉状样本？
A: If treating powder materials, it may be necessary to attach an inlet dust trap or filter before the 
vacuum pump to prevent particles from getting into the pump interior and damaging the pump.
   如需处理粉状样本，有必要在真空泵前段安装一个进气集尘器，防止粉粒进入真空泵内
部，导致真空泵损坏。