rigi造句

• Frp is a kind of composit materials which has high specific intensity high specific rigi low density excellent corrsion - resistance . in the fierce market competition , the emphasis of technic are focused on advancing quality reducing cost and advancing efficiency
  纤维增强塑料( fpr )是一类具有比强度高、比刚度高、低密度、耐腐蚀性等优异性能的复合材料。