air dan angin. Sebagian besar sumber energi terbarukan menghasilkan nol emisi karbon dan polutan udara minimal. Bahan bakar fosil (minyak, batu bara dan gas alam) di sisi lain, adalah sumber daya yang
In the rotor type throttle valve of the spark ignition type internal combustion engine wherein a communicating passage 15 for communicating the upstream side intake passage 12a and a downstream side intake passage 12b which are held by the rotor recessed part 12d of the valve casing 11 is ...