“pollution free”可以造什么句，pollution free造句
来源：语文精选馆 3.03W
Huabao is a pollution free insecticide which has strong contact poisoning function on aphids, cicadas, mites and scales.
The inserting pin with fixed structure which does not need oiling is pollution free and maintenance free.
Trunk inoculation of Shudaifu was long lasting, pollution free, safe to natural enemies and no pesticide residue in fruits. It could be popularized in the production.
