14.The motion of a body falling from rest in a resisting medium is described by the equation dv/dt=a–bv, a and b are constants. The velocity at any time t is
FA機器ドットコム / SP20-DT-A プログラマブルコントローラ (OMRON)
La impresionante KTM 990 Adventure DT-A, con tracción a las dos ruedas