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to phrases
alternate material
archit. 替换代用材料
busin. 替代材料
chem. 代用材料
dril. 备用料
el.mach. 代料
met. 代用物质
tech. 替用材料; 替换材料
alternate alternative material
el.mach. 替代材料
alternate material: 2 phrases in 2 subjects
Aviation1
Oil / petroleum1