The bulk density of X-ray shielding mortar is:

1.	The bulk density of X-ray shielding mortar is:
A.	6-12 kN/m3
B.	5 kN/m3 and above
C.	22 kN/m3 and above
D.	10-20 kN/m3
Answer» D. 10-20 kN/m3

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