If the data has been successfully queued for transmission, a zero is returned.
如果数据成功地排到传输队列，则返回0。
Cutting machine transmission system adopts imported gear, rack, cutting precision to achieve zero error.
切割机传动系统采用进口齿轮、齿条，切割精度完全达到往返原点零误差。
Zero Transmission Level Point?
零传输电平点ZTLP ？
Zero Transmission Level Point?
零传输电平点ZTLP ？
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