以下为句子列表：
英文: Hand Scribe Mark - A marking that is hand scratched onto the back surface of a wafer for identification purposes.
中文: 手工印记-为区分不同的晶圆片而手工在背面做出的标记。
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英文: The main features are that the back surface weiding seams are even, smooth and weld edge tidy, excellent in performances of welding technology and welding seam dynamics.
中文: 主要特点是背面焊缝匀称、光滑，焊趾整齐，焊接工艺性能及焊缝力学性能优良。
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