| http://www.w3.org/ns/prov#value | - In such a conventional conveying system, the steering guide rail and the steering trolley to be engaged by the guide rail are located below the driven wheel at the front center of the SPPC or below the central position of the SPPC. Therefore, even if floor plates placed along the slit are removed, such as in the case of repairing the trolley, work access is hampered by the SPPC that is located abo
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