And close to the mast step the starboard deck plank has small ovalsurface. It is the trace of a pomp, of course!
并靠近桅杆一步右舷甲板木板小椭圆形的表面。这是一个泵的踪迹,当然!
2
Probing the realization way of travelling wave into the stator of motor, proving the surface of motor stator particle existence oval of sport at the wave.