Gōng / chǎng / ān / zhuāng / le / xīn / de / chú / chén / jī / yǐ / jiǎn / shǎo / kōng / qì / zhōng / de / fěn / chén工厂安装了新的除尘机,以减少空气中的粉尘。The factory installed a new dust-removal machine to reduce airborne dust.