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。
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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