The first and second regions are either directly or indirectly joined by solid state welding to form a unitary fluid conducting replacement part.
第一与第二区域通过固态焊接既可直接地也可间接地结合，以形成整体的流体传导置换部件。
2
Based on theories of computational fluid dynamics and heat transfer, an axial symmetry finite element model of velocity and temperature field of spot welding for aluminum alloy is established.
Many industrial applications such as web tensioning, ultrasonic welding, positioning, fluid coating, and laser cutting demand accurate control of pressure and flow.