| 摘要 |
A broad blade for applying and trimming cement at the seams, corners, and nail holes in wallboard extends from a handle in telescope fashion, enabling the user to extend his reach to, for example, ceilings. The blade is an extension of one sliding member, which slides within a second, both contained within the handle and both engaged at stop holes along each sliding member by a pin, which the user manipulates with his thumb. The members extend from the handle, first one and then the other, in such a manner that substantial support is given to the blade, even when fully extended.
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