拆卸 (chāi xiè) is a transitive verb meaning 'to dismantle' — specifically, to carefully take apart machinery, equipment, or assembled structures into their component parts. The first character 拆 (chāi) means 'to pull apart' or 'to break down', while 卸 (xiè) means 'to unload' or 'to remove', often implying the removal of parts under controlled conditions. Together, they emphasize a deliberate, methodical disassembly process rather than destruction.

This term is commonly used in technical, industrial, and maintenance contexts — for example, when servicing engines, removing HVAC units, or decommissioning factory equipment. It carries a formal, professional tone and is rarely used for everyday objects like furniture (where 拆 (chāi) alone suffices). It implies precision and purpose: dismantling with intent to repair, inspect, transport, or recycle — not simply discarding.