High-yielding ducks are lively and vigorous, and they are stout and fertile, with late feather changes, short moulting times, and low frequency. Low-yielding ducks have early feathering, long moulting times, and many times.
The shells of high-yield ducks are hard, oval and shiny; low-yield ducks produce soft shell eggs and misshapen eggs.
When the duck neck is lifted, if the duck's feet are stretched downwards and the toes are not stretched, they will be high-yielding ducks; otherwise they will be low-yielding ducks.
High-yield ducks have prominent eyes and eyes, long and wide mouths, long necks, large backs, neat and plumy feathers, and loose and moist cloacaes; low-yielding ducks have fine, sunken eyes, large heads and short necks, flat tip, narrow backs, and feathers. Loosing, Cloaca tightly wrinkled and dry.
Greenhouse Film Electric Roll Up
The Greenhouse Film Manual Roll Up Unit can roll up a length of 60-80 meter, running stably with fine out side looking and long time of usage. The inside drive gears are made of high quality steel with fine workmanship, and what is more, there is lubricating bearing assembled on the out put and input shaft. At the meantime, there is also a group of reverse gear added to it. All these make the unit to be light and easy for
Greenhouse Film Electric Roll Up,Roll Up Curtain Greenhouse,Greenhouse Film Vent Roller,Greenhouse Roll Up Motor
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