Abstract: Disclosed is a frozen vegetable subjected to dry heat treatment prior to freezing, the frozen vegetable exhibiting a drip loss during natural thawing of 7.20% or less, the frozen vegetable exhibiting a change in bulk density relative to fresh product of 1.90 or less. The frozen vegetable of the present invention is useful in that the frozen vegetable presents appealing voluminosity, generates little drip, is free of wateriness, and has crunchy texture.

Abstract: A dual hoist derrick system for deep sea drilling, capable of elevating a very long and massive heavy object involved in a drilling for deep sea, is provided with a normal drilling hoisting system and a heavy load hoisting system arranged on a single derrick in parallel. The derrick is mounted on a skid movable in a horizontal direction. The skid is provided with a cut broader than a blow-out prevention device, so that the skid may travel to a position of the blow-out prevention device to lift up the blow-out prevention device. The system contributes to speeding up in hoist speed of offshore drilling units for deep sea, reducing working hours and improvement in safety.