USB B Universal Serial Bus 通用串行总线
Press the button, serial debugging aides in the type b, appear in the window corresponding to the numerical keys.
ZLG7290键盘驱动程序。 按下按键，在串口调试助手中输入b，在窗口中立即出现按键所对应的数值。
The SUPPLIER shall prepare an Inspection and Test Plan (ITP) and submit it to B for approval no less than 30 days before start of serial production.
供应商的检验和测试计划应在批量生产开始前至少 30 天提交给 B 认可。
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