integration in the structure and application of the method of fixing the plastic film to cover the traditional 'tunnel' for the cultivation in protected environment.the traditional 'tunnel' pearl cultivation in protected environment, with additions in the structure and the application of the method of fixing sheet

摘要

the "tunnel" to the traditional cultivation in protected environment is composed of tubes of iron or wooden rods curve and spiking in the ground to form a semicircular support in the form of a "youin "which is set out in a plastic film which is f1ssato burial of extremes of the same cloth.the "tunnel" traditional made by the proposer.technical changes: 1) were designed by spurs with: (a) a helix to twist to the ground plates; b) a ring opened at the upper end; and (c) one or two connections to the grafting ofthere semicircolari extremes of the tubes.2) and was introduced to the system for securing the plastic film cover to the rotor axis stayed in open ring prepared at the end than the spur.with the changes indicated the tunnel is now known as traditional modultunnel so.me.r.'s