3 ms·
A cubic meter of wet sand weighs about 2 metric tons. 24/7 excavation is easy to underestimate like sailing ship traversal under way: yes, a sailing ship only m
by thechao 6y ago
A cubic meter of wet sand weighs about 2 metric tons. 24/7 excavation is easy to underestimate like sailing ship traversal under way: yes, a sailing ship only makes 4 knots (or whatever), but it dies so for 168 hours a week.