In the Kraft process of sulphate paper pulp manufacture, the black liquor and the white liquor storage tank is made of

In the Kraft process of sulphate paper pulp manufacture, the black liq

1.	In the Kraft process of sulphate paper pulp manufacture, the black liquor and the white liquor storage tank is made of
A.	concrete
B.	wood
C.	steel
D.	porcelain
Answer» D. porcelain