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Today, crankshafts for large 2-stroke crosshead engines are of the ______ type.

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people in large cities tend to excuse criminals  people 'in small towns 'still stick to old discipline and standards  today's society lacks sympathy for people in difficulty  people in disadvantaged circumstances are engaged in criminal activities  
dates from; very valuable    dating back to; of great value    dated back to; of much value    dating from; very value  
splash method  mechanical force feed lubricators  detached sump method  internal cooling passages in the crankshafts and connecting rods  
its amount was    amounts to    amounting to    it was amounted  
a two-stroke engine can ’t work without cylinders  a two-stroke engine can ’t work without pistons  a two-stroke engine can ’t work without crankshafts  a two-stroke engine can ’t work without a blower  
basing on       according to   accounting for       finding out  
unusually solid welded  never be solid forged  almost invariably solid forged  almost invariably be welded  
forged  cast  made  shrunk  
large animal were vulnerable to the changing environment  small species survived as large animals disappeared  large sea animals may face the same threat today  slow - growing fish outlive fast - growing ones  
is shipped    are shipped    has shipped    have shipped  
main bearings  connecting rod bearings  piston pin bushings  All of the above  
enough/to  too/to  such/so  so/that  
where    when    which    why  
the piston rods  the crank throws  the thrust bearings  the main bearings  
cause.  caused  causes  causing  
is shipped  are shipped  has Shipped  have shipped  
to live    living    live    which live  

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