| 摘要 |
A digger derrick truck for installing poles into the ground. The digger derrick truck includes a boom on which a pole guide assembly is slidably mounted. The pole guide assembly is operatively associated with a latching mechanism which releasably couples the pole guide assembly and the boom in an operative position and an inoperative position. The latching mechanism includes a latch arm and a release mechanism such that, when the boom is retracted, the release mechanism allows the latch arm to pivot and couple the pole guide assembly and the boom.
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