Machine for drawing metal sheets, which comprises a static support and a moving support that hold a metal sheet during a process of drawing said metal sheet, and driving means that cause a longitudinal movement of said moving support in relation to said static support during said process, a section of said metal sheet comprised between said supports being drew and tensioned. The air actuated hydraulic pump is equipped with a pilot operated guided poppet valve comprised of several parts in separable connection, and a muffler so that the user doesn’t have to replace the whole piston with a new one if only one of the parts is damaged, and that noise can be reduced when the pump is working. A metering device in an inhaler includes a pressurized source of medicated fluid and a metering chamber configured to deliver a predetermined volume of fluid to a heated flow passage in the inhaler. The gateway transmits the requested information back to the client applications in which the information is filtered by the gateway according to their associated security levels. The mass analysis portion analyzes mass of an ion produced by the ionization portion. The first and second sides face each other and are connected by the third side.