Which screw thread has triangular thread form? (Multiple options: 10 points)
A、Metric thread;
B、55°sealingpipe thread;
C、55°non-sealingpipe thread;
D、Buttress thread
发布时间：2025-02-23 02:20:00
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答案：Metric thread;
55°sealingpipe thread;
55°non-sealingpipe thread
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