Traditional statues were most carved in wood or stone or moulded in clay and could hardly ever involve with complicated machining or casting.
传统雕塑因为大多以泥塑木胎工艺和小型木石雕刻为主，而不太会涉及到复杂的机械、铸造等加工制作工艺。
2
An unsaturated polyester resin was synthesized from dicyclopentadiene maleic acid and ethylene glycol. this resin can be moulded by casting and also can be hardened in air.
用二环戊二烯，顺丁烯二酸和乙二醇合成不饱和聚酯，这种不饱和聚酯既可浇铸，也可以在空气中固化。
3
An unsaturated polyester resin was synthesized from dicyclopentadiene, maleic acid and ethylene glycol. This resin can be moulded by casting and also can be hardened in air.