1. Flow adjustment 1. The flow cannot be adjusted (1) Visual inspection: first check whether there is any obvious air leakage in the instrument system. When a large leak occurs in the gas path of the instrument system, it is likely that the flow rate cannot be adjusted up. If you can't hear…

Get ready for the ultimate eco-drop! This October, Noughty is launching Limited Edition Zero-Waste Scrunchies, and they’re not just cute — they’re doing …