单选题One method of constructing large marine diesel engines and reducing the total engine frame weight is through （）.Acasting interlocking componentsBwelding plates to form sections for assemblyCforging integral componentsDcase hardening integral components
单选题
One method of constructing large marine diesel engines and reducing the total engine frame weight is through （）.
A
casting interlocking components
B
welding plates to form sections for assembly
C
forging integral components
D
case hardening integral components
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