Flow meters generally have the following types: differential pressure flow meters, turbine flow meters, fluid vibration flow meters, volumetric flow meters, ultrasonic flow meters, target flow meters, and Coriolis mass flow meter.......

The growth period of mid-season rice is generally 130~160 days. In the short-term high temperature weather, the growth period is shortened. The cultivation method of mid-season rice is also slightly different from that of early rice and late rice. Teacher Xiao Huizi has.......