He made a living hawking cleaning products from door to door.
他靠挨家挨户推销清洁用品为生。
The door handles were made of brass and needed cleaning regularly.
门把手是铜制的，需要定期清洗。
Development of Technology of Automatic Oven Door Cleaning with High Pressure Water
高压水自动清扫炉门技术的研制
There a sliding door at the butt plate. Push up a copper tube containing cleaning tools.
枪托有滑门，向上推可取出铜管装的擦枪工具。
Design on Assembly Formed Milling Cutter of Plastic Window and Door Corner Cleaning Machine CAO YAN QING
塑料门窗清缝清角机组合成形铣刀设计
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