Abstract: A system for maintaining fish and shellfish in an anesthetic state, the system includes at least: an anesthetic tank configured to allow the fish and shellfish to be so anesthetized as to be in an anesthetic state; and a maintenance tank configured to allow the fish and shellfish anesthetized in the anesthetic tank to be maintained in the anesthetic state while being transported, wherein, in the anesthesia tank, a carbon dioxide concentration is maintained higher than or equal to 65 ppm as well as lower than or equal to 85 ppm, and an oxygen concentration is maintained higher than or equal to 60%, and wherein, in the maintenance tank, a carbon dioxide concentration is maintained higher than or equal to 10 ppm as well as lower than or equal to 40 ppm, and an oxygen concentration is maintained higher than or equal to 60%.

Abstract: A connector for temporary scaffolding at an end of a lateral member, to be wedge-connected to a receiver around a strut, includes: a wedge body provided movably at the end of the lateral member upward and downward relative to the lateral member; a locking body including a claw formed such that, as a result of the wedge-body's moving downward, the claw could travel from initial to locking position with respect to the receiver; and a biasing body capable of pressing the locking body toward the wedge body, wherein the wedge body includes a shoulder protruding toward the locking body, the locking body includes an interfering portion protruding toward the wedge body, and when the claw is at the initial position, the shoulder is blocked by the interfering portion from moving upward, thereby preventing the wedge body from moving upward and the locking body from traveling toward the biasing body.

Abstract: A system for maintaining fish and shellfish in an anesthetic state, the system includes at least: an anesthetic tank configured to allow the fish and shellfish to be so anesthetized as to be in an anesthetic state; and a maintenance tank configured to allow the fish and shellfish anesthetized in the anesthetic tank to be maintained in the anesthetic state while being transported, wherein, in the anesthesia tank, a carbon dioxide concentration is maintained higher than or equal to 65 ppm as well as lower than or equal to 85 ppm, and an oxygen concentration is maintained higher than or equal to 60%, and wherein, in the maintenance tank, a carbon dioxide concentration is maintained higher than or equal to 10 ppm as well as lower than or equal to 40 ppm, and an oxygen concentration is maintained higher than or equal to 60%.

Abstract: A connector for temporary scaffolding at an end of a lateral member, to be wedge-connected to a receiver around a strut, includes: a wedge body provided movably at the end of the lateral member upward and downward relative to the lateral member; a locking body including a claw formed such that, as a result of the wedge-body's moving downward, the claw could travel from initial to locking position with respect to the receiver; and a biasing body capable of pressing the locking body toward the wedge body, wherein the wedge body includes a shoulder protruding toward the locking body, the locking body includes an interfering portion protruding toward the wedge body, and when the claw is at the initial position, the shoulder is blocked by the interfering portion from moving upward, thereby preventing the wedge body from moving upward and the locking body from traveling toward the biasing body.