n.

1. 支架；擱凳
2. 【建】棧橋，高架橋

n.

1. a framework consisting of a horizontal beam supported by two pairs of sloping legs, used in pairs to support a flat surface such as a table top.
2. (also trestlework) an open braced framework used to support an elevated structure such as a bridge.
3. (also trestletree) each of a pair of horizontal pieces on a sailing ship's lower mast supporting the topmast.