由于轮转向装置转向角度小，制造工艺复杂，成本高，一般较少应用。
Because of limited turning Angle and higher cost due to complex manufacturing processes, wheel steering is little used.
由于微透镜板制造工艺复杂、成本高，大大限制了该技术的广泛应用。
The manufacturing technique of micro-lens arrays is complicated and expensive, thus limiting the application of the technology.
其电枢制造工艺复杂、要求高、难度大，需要采用新的材料和加工技术。
The technological process to manufacture the armature of CBLDCM is complex, exigent and difficult. The new material and process technique are needed.
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