問題詳情
42. 塑膠管加熱彎曲時呈現皺紋狀，其原因為
(A)溫度過低
(B)火燄變形
(C)溫度不均
(D)溫度過高。
(A)溫度過低
(B)火燄變形
(C)溫度不均
(D)溫度過高。
參考答案
無參考答案
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