The type of this article is " used for product " . it analyzes surface pollution of metal , hydro capacity and effect to wall piping quantitatively on the base of the rinsing of piping of hydraulic system of precise - rolling machine at the hot sequential rolling plant . by analysis , we confirm the fit flux and pressure when rinsing , design high - ability , high - efficiency , wide - applicability whole set equipment 本论文的成果直接用于生产，以太钢热连轧精轧机液压系统的钢管清洗为背景，对金属表面污染进行分析，对液压钢管冲洗时流体的性能和其对管道内壁的作用效果进行定量的分析，确定合适的冲洗流量和冲洗压力，设计制造了能力大、效率高、效果好、适用广的成套装置。
As a new foundation improvement technology , the cast - in - situ concrete thin - wall pipe pile ( pcc pile ) is applied widely in the construction of the highway , civil architecture , haven and sea embankment etc . the pcc pile has a great prospect because it has superiority in the treatment of soils , such as construction period , cost and environment protection 现浇混凝土薄壁管桩(简称pcc桩)及其复合地基是一种全新的地基处理新技术，已应用于高速公路、民用建筑、港口、海堤等工程建设中， pcc桩在处理效果、工期、造价、环保等方面具有较大的优越性，因此在地基处理中具有广阔的应用前景。
It also gives the semi - ellipse closing roller forming principle & quot; semi - ellipse + bouncing = round & quot; , and makes the principle formulated and quantitative for the control method and pattern of the pipe forming bouncing . this is the reasonable model for forming of thick wall pipe and high stress pipe 指出半椭圆闭口孔型辊的成型思想是“半椭圆+回弹量=圆” ，并且使这一思想公式化、数量化，为控制成型管坯的回弹提供了方式和方法，是成型高强度厚壁管的理想模具。
Abstract : backing weld procedure technique of all - position narrow gap and thick - walled pipe welding is developed about all - position single - pass welding section analysis , wire feeding behavior , weld arc length , welding current analysis , procedure and joint test . the achievement has general guide meaning to producing and testing all - position welder 文摘:从单焊道全位置区段、送丝行为、焊接弧长(电压) 、电流行为分析、工艺试验和接头检验等几方面介绍管道全位置打底焊工艺特点，其研究成果对全位置焊接机的制造和调试具有普遍指导意义。
