ock is provided with a reversible The principal part of the weight being below the center placed in one of six holes in the edge of the upper flange, sliding catch, D, which holds the key-hole guard in place enables the cock to beaccurately turned the required distance. serves to keep steady and… … they are dry. The printing is done by the On each side of the lock a recess is made which incloses usual photo paper printing frame, substituting the key-hole, and is sufficiently deep to receive the full thick- the design on tracing paper for the glass nega- ness of the guard. The sliding…
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