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第一手材料
dìyīshǒu cáiliào
agric.
first hand materials
busin.
first hand material
;
firsthand data
econ.
firsthand material
proj.manag.
first hand information
tech.
first-hand information
;
first-hand material
textile
first hand data
第一手材料
原始材料
dìyīshǒu cáiliào
bridg.constr.
first-hand data
;
firsthand material
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