問題詳情
72. 石灰氧化鈦系電銲條的種類符號是
(A)E4916
(B)E4326
(C)E4319
(D)E4303。
(A)E4916
(B)E4326
(C)E4319
(D)E4303。
參考答案
無參考答案
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