| 摘要 |
<p>In one aspect the invention provides a tool to inspect a diversionary passage of a pipeline pig retriever. The tool comprises a generally longitudinal member having a first end and a generally opposing second end, a grappling hook at the first end and a mirror connect to the second end. The grappling hook is suitable for removing a pipeline pig from the diversionary passage and the mirror is suitable to allow an operator to view inside diversionary passage.</p> |
