217what points of contact existed between these languages and between the peoples who spoke them?
217这两种语言之间以及使用这两种语言的两个民族之间，存在过哪些接触点？
Answering these questions allows you to populate both sections Process Schedule, and Points of contact for future correspondence.
回答以上的问题，就可以完成以下部分过程时间表，及未来通信的联系点。
Offering 1 micron repeat accuracy, these precision contact switches are designed for setting reference points, checking tolerances, monitoring, gauging and calibrating tasks.
其提供1微米的重复精确度，这些精确的接触开关专门设计用来设定参考点，检查公差，监测，计量和校准工作。
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