| http://www.w3.org/ns/prov#value | - BRIEF DESCRIPTION OF THE DRAWINGS [0010]FIG. 1 is a side view of a stacker crane. [0011]FIG. 2 is a front view of the stacker crane. [0012]FIG. 3 is a left side view of a traveling vehicle. [0013]FIG. 4 is a right side view of the traveling vehicle. [0014]FIG. 5 is a sectional view taken along line V-V in FIG. 4. [0015]FIG. 6 is a sectional view taken along line VI-VI in FIG. 4. [0016]FIG. 7 is a
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