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1·The molder must recognize the dangers of excessive fill speed, insufficient injection pressure, excessive melt temperature, and inadequate packing.

注塑工必须认识过快填充速度、不足注塑压力、过高融化温度和不充分挤压的危害性。

2·But the present its packing existence packing protective value is insufficient, questions and so on packing material not environmental protection.

而目前其包装存在包装保护性能不足，包装材料不环保等问题。