| 摘要 |
<p>A DEPTH GAUGE A depth gauge and use of a depth gauge. One depth gauge comprises first and second elongate members pivotally coupled to each other for relative rotary movement between the first and second members; a reference portion formed on the first member; a tip portion formed on the second member; wherein the tip portion is disposed on the second member such that the tip portion extends substantially tangentially with respect to the relative rotary movement between the first and second members</p> |
