... water boiler, indust Raw metrical: crop like saw dust, corn stalk, wheat stalk, cotton stalk, rice straw, rice husk, peanut shell, corncob, bark, leaves ... green fuel with high energy, which raw material is straw, stalk, bark, industry waste, ect, crushed & pressed.The feature of end ... stalk2. High density, it is 10-15 times to raw stalk in weight, density: 0.8-1.4g/cm3. Durable to ...