"Square Heads " CNS Standards List| Cast Steel | General Test | Black wax | Grades Flowering | Method test | ISO Miniature | Grades Loquat | Lead Acid | |
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CNS 66
2017 Edition Square Heads and Holes (for Shaft, Hand Wheel and Handles) 方頭及方孔（用於軸，手輪及手柄） |
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CNS 66
1972 Edition Square Heads and Holes (for Shaft, Hand Wheel and Handles) 方頭及方孔（用於軸，手輪及手柄） |
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