In order to simplify the assembly way, reduce the synthesizing cost, and furthest avoid impurity entering into PCBN, we can introduce the technique of graphite pot+molybdenum cup.
High quality PDC for oil drilling bits is synthesized by growing technique under the conditions such as high temperature and high pressure, proper diamond size, reasonable assembly way, reasonable synthesizing parameters and unique interface design.
In this paper, based on the analysis of 3 - 5 kilometers wireless telephone and interphone, a design scheme about a kind of high frequency power - transistor which worked at 175MHz is introduced. The power - transistor's design - parameters, physical - parameters, layout - design, assembly - method and reliability - design are also discussed in the paper.
Using wood cell's self combine way can form new wood matrix composites, nm wood powder production's bonding agent has no pollution, it can replace the poisonous bonding that contains formaldehyde, bonding agent's Green Revolution can start from nanometer and micrometer technology.
In accordance with problems of serious leakage and short service life of packing seal for high pressure liquid plunger displacement pump,by means of theoretical analysis,testing and improvement on the fields of sealing structure characteristic,packing selection,packing assembling form,development of complex packing and lubrication auxiliary system,the working period of seal was prolonged greatly,the seal failure was reduced sharply,and the obveous economic benefit was obtained. the passive state of production was turned back.
At first, the initial interface pressure in a two-layered cylinder caused by a heat-assembling method is considered as the initial condition of a thermal elastodynamic equilibrium equation.
We present a systematic analysis of three-dimensionally (3D) ordered photonic crystals fabricated using the recently reported inward growing self-assembling method.