Poaceae have hollow stems called culms plugged at intervals by solid leaf-bearing nodes. Grass leaves are nearly always alternate and distichous (in one plane), and have parallel veins. Each leaf is differentiated into a lower sheath hugging the stem and a blade with entire (i.e., smooth) margins.oaceae have hollow stems called culms plugged at intervals by solid leaf-bearing nodes. Grass leaves are nearly always alternate and distichous (in one plane), and have parallel veins. Each leaf is differentiated into a lower sheath hugging the stem and a blade with entire (i.e., smooth) margins.
Air conditioning system components consisting of Condensing Unit, Evaporator Coil, Refrigerant line. How air conditioning works is kind of a mystery to many of us. Furnaces are easy to understand, they heat air and blow it around your home in ductwork.
Basically, the air in your home moves over the cold evaporator coil thatâs inside your home, which absorbs the heat from the air with refrigerant (a heat transfer fluid).The refrigerant in that coil then flows to the warm condenser coil.ut weâll try to simplify it. Your air conditioner has three main mechanical components to cool your home: 1  a compressor (a pump that pressurizes the refrigerant). 2  an evaporator coil (inside cold coil). 3  a condenser coil (outside warm coil).