（二）违反国家规定，收购铁路、油田、供电、电信、矿山、水利、测量和城市公用设施等废旧专用器材的；
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Jasper is a content writing and content generation tool that
Transform backpressure gaps: Pull-through transforms execute on-demand. Data doesn't cascade through intermediate buffers; it flows only when the consumer pulls. Stop iterating, stop processing.