手网 meaning in Chinese

extension wire

Water quality . methods of biological sampling . guidance on handnet sampling of aquatic benthic macro - invertebrates
水质.生物取样法.水生海底大型无脊椎动物的手网取样指南
Water quality - methods for biological testing - methods of biological sampling : guidance on handnet sampling of aquatic benthic macro - invertebrates
水质.生物取样法.水生海底大型无脊椎动物手网取样指南
Water quality ; methods of biological sampling ; guidance on handnet sampling of aquatic benthic macro - invertebrates iso 7828 : 1985 ; german version en 27828 : 1994
水质.生物取样法.水生海底大型无脊椎动物的手网取样