Thimble form in material fetching (fixed punch head) to keep size of rough ball steady.
采用顶针接料结构(固定冲头)坯球尺寸稳定。
Finally, influence on safety of oil thimble is analyzed by the size of crack in engineering application.
分析了工程实例中裂纹缺陷对套管安全的影响。
Finally, influence on safety of oil thimble is analyzed by the size of crack in engineering application.
分析了工程实例中裂纹缺陷对套管安全的影响。
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