99色精品-9色在线-99色在线-99色视频国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

<em id="ie4mq"></em>

<pre id="ie4mq"><strong id="ie4mq"></strong></pre>

單項(xiàng)選擇題

If the pump for a hydraulic anchor windlass is overheating, the cause may be （）.

A.excessive drive motor speed
B.excessive pump discharge pressure
C.too low of a tilting box angle
D.insufficient drive motor speed

你可能感興趣的試題

單項(xiàng)選擇題

Refrigerant enters the condenser as a （）.

A.high pressure liquid
B.low pressure vapor
C.high pressure vapor
D.low pressure liquid

單項(xiàng)選擇題

An excessive amount of water is prevented from entering a vessel using a water lubricated stern tube bearing by the use of the （）.

A.propeller hub
B.lignum vitae
C.shaft packing
D.labyrinth seal

<sup id="gat4o"><pre id="gat4o"><sup id="gat4o"></sup></pre></sup>

<ins id="gat4o"></ins>

<pre id="gat4o"><strong id="gat4o"></strong></pre>

<dl id="gat4o"></dl>