A . the connecting rod
B . the cross-head
C . the piston rod
D . the air box
[单选题]The cast iron()for the cross-head are attached to the top section and seal off the crankcase.A . cylinder coverB . cross-head shoesC . guide-waysD . scavenging boxe
[单选题]Cast iron carrier rings, () machined grooves, are provided for all the pistons.A . caulked intoB . caulking intoC . pressed intoD . screwed into
A number of cylinder liners are enclosed in one cast iron casing to form a( ).A
The period _________ people learned to melt iron is called the Iron Age.A. whenB
[单选题]With the guide _________the way, the rescue team set off on foot into the dark night.A. leadsB. ledC. leadingD. to lead
[单选题]Which is( ), iron or copper?A.heavierB.heavyC.more heavyD.much heavy
It was only with the help of the local guide ______.( )A. was the mountain climb
[单选题]What is most probably a “town guide “in the conservatism?A. A bookB. A personC. A shop