使帆桁平行于首尾使更牢固的英文

brace up

• 使:    send; tell sb. to ...
• 帆:    sail
• 桁:    purlin
• 平行:    of equal rank; on ...
• 首尾:    the head and the t ...
• 更:    more; still more; ...
• 牢固:    firm; secure; fast ...