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ship caisson
tech. 船坞闸门; 船型沉箱; 船形沉箱; 浮箱式坞门; 浮坞门; 浮式沉箱
water.res. 船形沉函
ship-caisson
hydroel.st. 浮式沉箱
ship -caisson: 5 phrases in 1 subject
Technology5