It is like As when we look looking into the driver's cabin of a locomotive: we see handles
which
that
all look more or less alike. (That's is understandable natural, since they are all
made
supposed
to be
held
grasped
with the ha[d|n]d.) ˇBut [O|o]ne is the crank valve that can be moved ˇregulated by continuously over degrees (it regulates the opening of an air valve); the an other is the handle of a switch, which has only two ˇeffective positions, in which it is effective it's either shut or open; a third is the handle of a brake lever, the
harder
more strongly
you pull it the more strongly the brake is applied; a fourth, the handle of a pump, works only as long as it is
8
it is moved back and forth.