空心

• Simple a predefined set of simple - shaped outline images
  预定义的简单空心形状的图像集。
• Tests on mould pressure for void concrete plate
  空心板梁砼模板压力试验
• Experiences of reducing twist irregularity of folded yarn
  空心锭子差捻包缠纱捻度作用研究
• B : that was his third air ball today
  那是他今天所投的第三个空心球了。
• Study on the hollow anti - sliding piles of reinforced concrete
  钢筋砼空心截面抗滑桩的研究
• Live working - insulating hollow tubes for electrical purposes
  带电作业.电工用绝缘空心管
• High temperature explosion - proof glass tube series
  高温玻璃空心吹制类
• Polyacetale hollow rods of circular cross - section ; dimensions
  聚缩醛树脂圆截面空心棒.尺寸
• Test methods for the small concrete hollow
  混凝土小型空心砌块试验方法