- arch without articulation无铰拱;
- arch truss拱形桁架;
- arch thrust拱推力;拱应力;
- arch stone拱石;
- arch falsework楔形砖;
- arch door拱门;
- arch dam拱坝;
- arch center拱架;
- arch bridge拱桥;
- arch bar（车轴的）拱板，拱杆，弓杆;
- arch apex拱顶石;
- arch abutment拱端，拱台;
- a block of一大块…;
- block up封闭; 堵塞;垫高;封锁;
- Block trade大宗股票交易;
- block signal块信号;
- block record办理闭塞登记簿，成组记录;块记录;
- block plan方框图;
- block out遮住;遮挡…使不被印出来;画出…的略图; 打草样;
- block off关闭， 封闭， 封锁;
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