process for the preparation of n, n '- bis (idrocarbilossicarboni) n, n' - bis (2, 2, 6, 6 - tetrametil - 4 - 2) diammine.

摘要

the closure and security device (1) of a pressure cooker (2) comprises essentially a handle (10) incernierata the lid (3) which is composed of a first element to harpoon (16), and a second element (17) sviluppantesi on the extension of the first.the first element (16) is attached to the lateral surface (12) of the body (4) closing the pot kept the pot (2).during operation, the internal pressure of the pot (2) goes outside a bolt element (11) which in this position requires the end free of the second element (17).the handle (10) is blocked when the pot is in pressure. the device is practical and at the same time.