单选题Cast irons weakness in tension and under shock loading limits its use to low pressure steam, air, oil and low speed water fittingsThe above sentence, most probably means （）.Acast iron has weaknessBcast iron can stand up shock loadingCcast iron fittings are only suitable in low pressure situationDeast iron fittings are not suitable in low pressure situation
单选题
Cast irons weakness in tension and under shock loading limits its use to low pressure steam, air, oil and low speed water fittingsThe above sentence, most probably means （）.
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
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