| 摘要 |
A screen frame ( 24 ) is detachably connected to a support frame structure ( 22, 124, 134 ) by locator pins ( 46, 118 ) and locator pin sockets ( 56, 112, 136 ). An elongated support arm ( 26 ) supports either a light box ( 34 ) or a work piece support ( 36 ) in a proper position relative to the print frame ( 24 ). The light box ( 34 ) and the work piece support ( 36 ) are interchangeable on the support arm ( 26 ).
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