SAE MA3446B-2021
螺栓，机用 T 型头，倒角分类：1210 MPA/730°C CLOSE TOL SHANK，UNS N07001，公制
BOLT, MACHINE - TEE HEAD, CHAMFERED CLASSIFICATION: 1210 MPA/730 °C CLOSE TOL SHANK, UNS N07001, METRIC
SAE MA3446B-2021相似标准
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