Double-tapered rectangular steel tubes are composed of two tapered ends and a prismatic intermediate part.
双锥型变截面矩形钢管是指两端为锥型变截面、中间为等截面的组合矩形钢管构件。
A conduit (18) for an air duster is branched from an intermediate part of an air conduit (17) interconnecting an air supply source (16), which supplies compressed air, and an air tool.
用于空气除尘器的管道(18)从连接空气供应源(16)与气动工具的空气管道(17)的中间部分分支出来，所述空气供应源供应压缩空气。
According to the position: proximal end 5, intermediate part 45, distal end 4. We divided the fracture into two types: simple scaphoid bone fracture and fracture with rotate dislocation.
按骨折部位，结节部4例，腰部45例，近段端5例。将骨折分为二型，即单纯型腕舟骨骨折和骨折旋转脱位型。
According to the position: proximal end 5, intermediate part 45, distal end 4. We divided the fracture into two types: simple scaphoid bone fracture and fracture with rotate dislocation.
按骨折部位，结节部4例，腰部45例，近段端5例。将骨折分为二型，即单纯型腕舟骨骨折和骨折旋转脱位型。
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