请安排一辆加水车/放污车/空调车/除冰车/工作梯。
Please arrange water servicing unit /a toilet servicing unit /an air conditioning unit /a deicing unit /a ladder for us.
本发明提供了一种升降工作梯的延伸工作平台，其延伸工作平台具有自锁功能。
The invention provides a self-locking extension working platform of a lifting working ladder, wherein the extension working platform has self-locking function.
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