Abstract: A full-ocean-depth fidelity enzymological measurement device for microbial extracellular enzyme is provided, comprising a pressure-maintaining sampling bottle, pressure-maintaining transfer equipment, a pressure-maintaining enzymological reactor, and heat preservation equipment and enzyme activity detection equipment. The pressure-maintaining enzymological reactor comprises a barrel body, a plug, polytetrafluoroethylene gaskets, an O-ring, a piston, a high-pressure straight-through valve, and a high-pressure connector. The pressure-maintaining enzymological reactor is in a closed barrel body shape and is internally provided with the piston, and the plug and the valve are arranged at each of two ends of the pressure-maintaining enzymological reactor; and the valve is connected to the pressure-maintaining transfer equipment through the high-pressure connector.

Abstract: The invention is an escalator handrail cleaning apparatus for a running handrail (1) on a guide rail (11) along an escalator (12), wherein the cleaning apparatus comprises: —a main body (3) with a preferably underlying, generally through channel (31) for the handrail (1) to pass through, —a steam supply hose (2) to a longitudinally running inlet channel (21) in the main body (3) and connected to one or more across distribution channels (5) in the main body (3), —a number of steam nozzles (6) from the distribution channel (5) directed towards the through passing handrail (1), —at least a first and a second squeegee gasket (7) for delimiting a space (38) in the through channel (31) between the main body (3), the through running handrail (1), and the surroundings and arranged for wiping off water and dirt from the through running handrail (1), —at least one drain channel (41) from the space (38) wherein the drain channel (41) conducts water, steam and dirt to a return hose (4), preferably by vacuum.