rowlocks

with cross thwarts for seats and rowlocks for oars with which it is propelled.

有交座位和推动前进的橡胶桨的浅底的小船。

It was that dull kind of a regular sound that comes from oars working in rowlocks when it's a still night.

这是每逢寂静的夜晚，船桨在桨子上发出的那种有节奏的沉闷的声音。