Designation

AB

FB

M1B

B2M

B3M

Depth (m)

4

1.8

1.20

1.20

1.20

Surface (m2)

0.37

3

1.47

0.37

0.37

Volume (m3)

18,500

54,000

29,400

7400

7400

Duration time (j)

3

16

6

3

3