Afterwards , we were taken into a room above ground to observe and learn how modern mines are controlled with modern equipment . The whole thing took about 30 minutes to see . After the coal mine , we went to see the U-505 Submarine . We spent time viewing its external features , then decided to take the on-board tour for 5 each . The controls I saw on-board looked to be ahead of their time . The U-505 was the first submarine I had ever been...
students ~
test ~
experiment ~
error ~
john wiley ~
error ~
msb ~
msr ~
complete block design ~
msab
SUBJECTS
