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压铸机械
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pressure casting machinery
压铸机械
将熔融金属液在高压的作用下高速充填至模具的型腔中并冷却成型,开模后得到固体金属铸件的一系列压力铸造机械。
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cohomological semipurity theorem
cohomologous
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cohomologous to zero
cohomology
cohomology algebra
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