non pollution technology pollution free technology pollution-free technology
Related Translations:
工艺: 1.(产品制作加工技术或方法) technology; craft; industrial art; workmanship; process; technique 短语和例子一项新工艺 a new technique; 这项采矿工艺不可靠。 the mining technique is shaky.2.(手工艺) handicraft; handicraft art 短