optional function meaning in Chinese

可选功能
任选功能

Optional functions of ultra - audible sound hobbing and unreeling error correction
可选配超声波滚和放卷纠偏功能。
4 . optional functions such as non conventional type cutting , pressing broken lines , and bottom sealing
4可选配异型剪切压虚线封底等功能。
The access system , in which the transfer rate can reach 2 . 3mbit / s , will be worked out by using the modem link with the mixlink line card . moreover it has the four - telephone - lines optional function by utilizing rs - 232 v . 24 interface usb interface . its transfers data format is hdlc mode , which can optimize the data stream transmission . in this way it will be satisfied of requirements of users " video frequency order programmer , video frequency conversation and file transmission
用此modem和mixlink的linecard相结合可以设计出传输速率高达2 . 3mbit s的接入系统；能用rs - 232 、 v . 24接口和usb接口对计算机的数据高速传送；其具有四路电话线的自选功能；其传输的数据格式是hdlc模式，能对数据流的传送进行优化，使之满足用户视频点播、视频会话和文件传输要求。