Where cement?
1000 
1000
400
100
+44
2
1
1000
1000
400
100
+94
1000
1000
400
100
+84
1000
1000
400
100
+61
1
1
1000
1000
400
100
+78
1000
1000
400
100
+52
1000
1000
400
100
+23
1000
1000
400
100
+60