作者: Robert M. Irwin
DOI:
关键词: Structural engineering 、 Engineering 、 Position (vector) 、 Rotation 、 Swing
摘要: There is disclosed a loading platform mounted cantileverally from vertical spindle carried walkway, such mounting being by means of horizontally extending pivot for rotation ramp lowered position over station to an elevated retracted adjacent the walkway. A locater on swing post selectively controlling positioning various angular locations. extension slidably longitudinal itself. The counterbalanced be normally urged its and position.