When processing large surfaces of metal or wood with sandpaper craftsmen have to attach it to various devices. We offer original clasp allows you to do this conveniently and quickly. It is a kind of wooden “book” with the “dust cover” of the skin, the ends of which are filled inside and securely fastened when closing with two rows of sharp Shura stand or studs. “Binding” is the piano hinge.
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DRAINAGE SECURED
is Drawn through the funnel and bound in a ring of nylon cord provide drainage when filling the vessel with liquid. Simultaneously, the loop will serve as a handle for hanging. 
CAPACITORS-GEMINI
Often, in order to work in a range of electrical oscillations of sound frequencies it is necessary to select the same capacitors. This and various or balanced bridge circuits, and is...
