| 摘要 |
<p>The mortar has a tripod with parallel legs that are pivotally attached to the base platform, and fitted with a raising mechanism. The parallel legs extend from and are parallel from the base platform to the raising mechanism. A lower stop is located upon one of the tripod legs, to act as a minimum elevation angle limiter to operate in conjunction a main spindle which is driven by the raising mechanism and makes the barrel tip. The spindle is connected to the barrel through the cross control which travels via a guide collar. A set of rear legs which are parallel and pivotally attached to the base platform.</p> |
