尾部采用齿轮条重力张紧装置；同步调节尾部滚筒行程。
The tail has a double-arm co-axial gravity tensioning device, which can adjust the tail roller synchronously.
5清扫器：头部清扫器安装在传动滚筒下方，空段清扫器安在尾部改向滚筒附近。
5sweeper: Caput sweeper is installed at lower part of driving roller while vacant section sweeper is installed at the end near the direction-chage roller.
5清扫器：头部清扫器安装在传动滚筒下方，空段清扫器安在尾部改向滚筒附近。
5sweeper: Caput sweeper is installed at lower part of driving roller while vacant section sweeper is installed at the end near the direction-chage roller.
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