发券(fā xuàn) 隧道和桥梁等施工为保证整体强度,在设计时通常要求在隧道顶底部衬砌一定厚度的混凝土,也叫仰拱。 另外,利用块料之间的侧压力建成跨空的承重结构的砌筑方法也称“发券”。
华盛顿夫人的头像单独出现在1886年发行的1元银元券上。
Mrs Washington was featured alone on the face of the $1 silver certificate in 1886.
上海人李慧珠(音译)用自己任教的幼儿园发的代金券和戏票,以及同事朋友送的化妆品换来500多件日用品。
Shanghai native Li Huizhu has swapped coupons and show tickets given by the nursery school where she teaches, and cosmetics gifted by friends and colleagues, for more than 500 items of everyday use.
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