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hard clay
busin. 硬质陶土
chem. 硬质粘土
earth.sc. 硬质黏土
geol. 粘土
hydroel.st. 硬黏土
tech. 硬质
hard china clay
chem. 硬质陶土
hard clay
: 10 phrases in 7 subjects
Agriculture1
Bridge construction1
Construction1
Engineering geology1
Geology1
Metallurgy1
Technology4