A tarp lashing system for an open bed trailer employs a novel hook that eliminates the need for threading an elastic cord through a series of D-rings on the tarp. If a HDD having no medium ID is used, the secure manager obtains a device ID specific to a computer system through a BIOS and manages encipheringdecoding of a content to be recorded into the HDD, with use of the device ID. As wobble wheels of the compressing pump push the diaphragm in turns, the water flow from each said inlet slot at each area will continuously run into each discharge spout at each area in said discharge base in turn so that each blade of the gasket moves up and down in turn as well, to achieve an open-and-shut effect of the discharge spouts. Next, a barrier layer is created on the treated substrate. Advantageously, as the locking bolt ingresses the channel, the catch is automatically adjusted along a second path registered non-parallel to the first path such that the channel is automatically aligned with the first path. The valve comprises means suitable to actuate andor visualize the selective positioning of the needle, preferably in the open condition.