buttress

• Specification for buttress threads
  锯齿螺纹规范
• Construction technology for pre - stressed anchor - rope in buttressed retaining wall
  预应力锚索在扶壁式挡墙中的施工技术
• Buttress inch screw threads
  英制偏梯形螺纹
• Truss - buttress nat - slab
  桁架式支墩平板坝
• Buttress screw threads
  斜梯形螺钉螺纹
• Buttress casing thread
  偏梯形套管螺纹
• Calculation and application of high buttress board in structure of reinforced concrete
  混凝土结构中模板高支撑的计算和应用
• Buttress thread screw
  斜梯形纹螺钉
• Buttress thread form
  锯齿形螺纹
• Buttress heel nail
  鞋跟固定钉