Vacuum tube encryption arrangement looks easy, it is very difficult, the main problem is a liner tube hole connection is too narrow after the processing difficulty, easy deformation.
真空管加密排列看起来容易，做起来是很难的，主要问题一是内胆管孔连接处过窄后加工难度大，极易变形。
Monopoly arrangement service team, and the distribution of encryption card, card positioning and receiving facility.
专卖点安排服务队伍，并分配加密卡、定位卡和接收设施。
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