| 摘要 |
The invention provides a housing defining a chamber, within which chamber an operator can perform a procedure on an object, the housing comprising a forward edge portion which in use, is located adjacent the object; viewing means for allowing the operator to see into the chamber; at least one input port through which a tool can access the chamber; and at least one evacuation port through which any waste material produced is removed from within the chamber; such that the procedure is performed in a contained environment.
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