A、east iron firings
B、mild steel fittings
C、small fittings
D、large fittings
更多“Cast iron and gunmetal fittings are used freely in small sizes at moderate pressure; large fittings, those for high pressure and temperature are cast or mild steelIn the above sentence, the word “those” means （）.”相关的问题
A、cast iron has weakness B、cast iron can stand up shock loading C、cast iron fittings are only suitable in low pressure situation D、east iron fittings are not suitable in low pressure situation
A、twice as large as with a cast iron piston B、the same size as with a cast iron piston C、half as large as with a cast iron piston D、the same size as the crown of an aluminum piston
A、A.east iron is a cheap material B、B.cast iron can pollute sea water C、C.cast iron has mere corrosive than bronzes to sea water D、D.cast iron is more corrosive to sea water when it meets with bronzes
A、not taper what so ever B、the skirt being tapered and smaller than the crown C、the skirt being tapered and larger than the crown D、the crown being tapered and smaller than the skirt
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