Sinomeasure SUP-DY2900 Optical dissolved oxygen meter yog siv nyob rau hauv Hanchuan Yinlong dej affairs txwv (Tswj rau Tuam Tshoj Dej Affairs Group).
Tuam Tshoj Water Affairs Group Limited yog lub tuam txhab muab dej hauv lub hauv paus hauv Hong Kong.Nws yog lub tuam txhab dej thaum ntxov tshaj plaws hauv Hong Kong, thiab tsuas yog Hong Kong cov npe lag luam uas tsom mus rau kev lag luam dej.
