back brace的用法和樣例：
例句
- The fatigue fracture reason of the weld seam at the back supporting rod of the main reductor of an aircraft has been analyzed by fractography and metallographic test.
對某飛機主減速器后撐桿焊縫疲勞斷裂原因作了分析。 - The back is another board held on by eight screws.
背板用八個(gè)螺釘固定。 - Heavyweight, black nylon with reinforced back panel padding.
質(zhì)感黑色尼龍為材料，填充背板，方便舒適。
