<label id="fowsa"></label>

<rt id="fowsa"></rt>

<span id="fowsa"><noframes id="fowsa"><rt id="fowsa"></rt>

單項(xiàng)選擇題

Large crosshead type engine generally has two lubrication systems, a function performed only by cylinder oil system is（）

A.lubricating
B.cooling
C.sealing
D.cleaning

你可能感興趣的試題

單項(xiàng)選擇題

In some diesel engine designs,（）the injection of cylinder oil is timed to impinge when the piston and only impinge on（）

A.is coming upward；cylinder ring belt
B.is going downward；piston ring belt
C.is coming upward；piston ring belt
D.is going downward；cylinder ring belt

單項(xiàng)選擇題

（）diesel engines generally have two systems of lubrication:（）a total loss system feeding and a circulating system lubricating the running gear and cooling the pistons.

A.Large crosshead type；crossheads
B.High speed；the cylinders
C.Large crosshead type；the cylinders
D.Four-stroke；pistons and cylinders

<span id="algyk"><small id="algyk"><address id="algyk"></address></small></span>

<span id="algyk"><small id="algyk"></small></span>