例句與造句

1. Protection was finished off with reinforced engine cradle plates which were also light alloy castings.
2. The propellant injector in the combustion chamber is a simple light alloy casting, cooled by the propellant flow.
3. Oil was forced through the crankshaft to the crankpins, then moved under centrifugal force to the cylinders and pistons from inside the crankcase which was a single light alloy casting.
4. It's difficult to find light alloy casting in a sentence. 用light alloy casting造句挺難的