如果需要，也可在聚远挤塑板上直接浇注混凝土与屋面联结成刚性整体。
If needed, concrete can be poured directly on Juyuan plastic extruded board to let the board to be coupled with roofing forming a rigid whole.
提出了一种以浓乳液聚合直接浇注制备新型有机硅类渗透蒸发分离膜的新方法。
A novel method of pervaporation separation polysiloxane membrane prepared via concentrated emulsion polymerization was proposed in this paper.
但由于镁的化学性质活泼，非常容易氧化、燃烧，导致镁合金无法在大气条件下直接进行熔炼和浇注。
Since its chemical character is very active, Mg alloy is prone to oxidation and burning, which makes it impossible to be melted and cast in air.
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