Etching , polishing and painting processes can release dangerous dust and chemicals including cyanide and arsenic .
蚀刻、抛光和烤漆流程可能释放出有害粉尘以及氰化物、砷等化学物质。
The team started by etching thin layers of brass on plastic film , which could be sewed onto a fabric .
研究团队首先在塑料胶卷上蚀刻多层薄的黄铜，这些塑料胶卷能够被缝合在布料上。
The stamps themselves are made by etching silicon wafers using the technique that makes microprocessors , and the sheets can be shaped to coat anything from cars to portable electronic devices .
One company selling hydrochloric acid for etching cement floors reckoned that , because it was in gel form and could legally be washed down the drain , the product was environmentally friendly .
