In large marine diesel engines cylinder oils usually contain additives formulated to impart the () to clean the rings and grooves.
A、inefficiency
B、oiliness
C、detergency
D、purity
A、inefficiency
B、oiliness
C、detergency
D、purity
A、a never saying die attitude B、an attitude to say never die C、an attitude of saying never die D、an attitude of never saying die
A、complicated circumstances B、changeable atmospheric pressure C、large density of traffic D、some strong signals from unwanted satellites
A、a small error in bearing or in laying it down on the chart has a greater effect in misplacing the position the longer the line to be drawn B、all scales are kept updated for vital information by Notices to Mariners C、the larger the scale of the chart,the greater the detail that can be shown on it D、the mariner using the medium scale charts for passage along a coast need not transfer on to a large scale for short distances