acoustic magnetic mine的用法和样例：
- The wide use of magnetic mines (set off by the magnetic field of steel ships) in the Korean War led to wood-hulled minesweepers.
- But Allingham remained a reservist, and during World War II he was called on to find a solution to the German magnetic mines that were bottling up the English harbor of Harwich, on the Essex coast.
- Opened the show with an acoustic set.
- It shows the presence of a magnetic field.