castings' microstructure
castings' microstructure
Which of the following does not belong to defects in castings?
Which of the following does not belong to defects in castings?
Because the castings of smaller engines are not so big and heavy， （） and cylinder block may be made in one piece.
Because the castings of smaller engines are not so big and heavy， （） and cylinder block may be made in one piece.
Shell-mold casting can produce many types of castings with close dimensional tolerances and good surface finish at low cost.
Shell-mold casting can produce many types of castings with close dimensional tolerances and good surface finish at low cost.
Small welding current is generally recommened for arc cold welding of castings due to （ ）. A: Small melting depth B: Small dilution C: Small heat input D: Small welding stress
Small welding current is generally recommened for arc cold welding of castings due to （ ）. A: Small melting depth B: Small dilution C: Small heat input D: Small welding stress
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