7.1 Characteristic of Tube System 7.2 Simplified Calculation of Framed Tube System 7.3 Design of Framed Tube System

平推流反应器 Piston Flow Reactor (PFR) 活塞流模型或理想置换模型 This type of units is illustrated in the following figure. This reactor consists of a tube inside which the reaction medium flows. This makes i t t h e s i m p l e s t s t r u c t u r e conceivable f or a continuou s o p e r a ti o n s ys t em . Th e h ea t exchange necessary to add heat to the system or to remove it generally occurs ac ros s the tube wall

7.1. Overall Structural Behavior of VS 7.2. Shear Wall Subsystem 7.3. Shaft (Tube) Subsystem 7.4. Rigid Frame Subsystem 7.5. Deflections

同济大学：《高层建筑结构》课程教学资源（参考资料）Comparison of Steel Tube Concrete Column with Steel Tube Concrete Composite Column

Composition Digestive tube消化管 Mouth Pharynx Superior digestive Esophagus tube Duodenum Stomach Small intestine Jejunum leum

Female Reproductive Organs Uterine (fallopian) tube Fimbriae Ovary Uterus Rectum Pubic bone Cervix Urinary

The Internal Reproductive Organs The Ovary卵巢 The Uterine tube输卵管 The Uterus子宫 The Vagina阴道 The Accessory Gland附属腺 The External Reproductive Organs

(1) extra-embryonic blood vessels ---blood island: at the middle of 3 rd week, wall of the yolk sac mesenchyma proliferate and form isolated cell clusters, the peripheral cell become flattened and differentiate into endothelial cell to from endothelial tube; central located cells are detached and develop into primitive blood cells(blood stem cell)

Arthur Kornberg (1918- ) of the U.S. produced DNA in a test tube. F. Sanger (1918- ) of Britain developed sequencing procedure for proteins, and later for DNA

管件及管接头tube 油箱reservoir 密封件seals 过滤器filter 附件 auxiliary components for hydraulic system 蓄能器Accumulator