| 摘要 |
<p>The device has a closable chamber opening (9) through which the hand tool and workpiece are removably inserted into an inner cavity (2). The inner cavity is observed through a transparent chamber wall. The human arms passage opening (12) is formed on the side of a portable chamber (1). The suction opening (13) is formed in the inner cavity and connected with a dust extractor. A flap (10) is hinged on one side of the chamber opening. A resilient seal portion (15) is attached with the passage opening.</p> |
