Basic problems on design of automatic control system of bit trajectory are analyzed in this paper.
文中对井眼轨道自动控制系统设计的有关基本问题进行了初步的分析。
Through the study of the injection mould for the plastic conduit, the problems on design of multi_cavity injection moulds for deep_cavity plastic parts were solved.
对中性笔笔帽塑件进行了分析,确定了模具结构,阐述了深腔强脱塑件模具的设计注意要点,对同类注射模具有较好的参考价值。
There is also plenty of advice on why certain operations may indicate problems with the query or table design.
与此同时,本章还就为何某些操作可能会引起查询或表设计上的一些问题给出了很多建议。
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