| 摘要 |
An apparatus in one example comprises one or more support members that are alignable substantially along directions that are identifiable through reference to mutually perpendicular x, y, and z axes. The one or more support members comprise first, second, third, and fourth support members that are connectable upon alignment of the first support member substantially in parallel with the y axis, the second support member substantially in parallel with the y axis approximately at a z offset with respect to the z axis, the third support member substantially in parallel with the z axis approximately at an x offset with respect to the x axis, and the fourth support member substantially in parallel with the z axis approximately at both the x offset and the y offset.
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