例句與用法

1. between july 19 and august 7, doc of the u . s . a . initiated antidumping duty investigations against light-walled rectangular pipe, laminated woven sacks, and tubenew pneumatic off-the-road-tires from china
   從7月19日到8月7日，美國商務部相繼對原產于中國的薄壁矩形鋼管、編織袋、非公路用輪胎發起反傾銷調查。
2. the piping workshop is equipped with three sets of pipe-welding machines and thereby may produce carbon steel and stainless steel round pipes in the sizes of 161140.84.5mm, and rectangular pipe in sizes of 15158080
   制管車間裝有4576及114三套焊管機組，可生產規格為161140.84.5mm的碳鋼和不銹鋼焊接圓管，以及規格為15158080的方矩形管。
3. based on the review, the fluid flow and heat transfer in the curved circular and rectangular pipes have been researched by employing perturbation method and numerical simulation with a physical model under the rotational orthogonal curvilinear coordinate in a rotating curvilinear pipe with multi-parameters . we firstly analyzed the fully developed fluid flow and heat transfer, mixed convection heat transfer, the development of flow and heat transfer in the inlet in different cross section ( circular, elliptical, annular and rectangular crossection ) . the variations of the secondary flow, axial velocity, distribution of temperature, the friction force on the wall, the ratio of friction factor as well as the nusselt number with different dimensionless parameters had been examined in detailed
   本文在總結和分析了一個世紀以來有關曲線管道流動和換熱特性的研究成果的基礎上，以旋轉正交曲線坐標系統下的多參數旋轉螺旋管道中的對流傳熱為物理模型，通過攝動方法和有限體積法，首次對各種截面(圓截面、橢圓截面、環形截面、矩形截面)旋轉曲線管道內充分發展流動的流動結構和傳熱特性(包括耦合對流傳熱特性)以及旋轉曲線管道開口段發展流動的流動結構和換熱特性進行了系統的數值模擬和理論分析，詳細討論了各種無量綱參數對管道內軸向速度分布、二次流結構、溫度分布、壁面摩擦力、摩擦系數比以及管道nusselt數的影響，獲得了若干創新性成果。