fatigue-failure of drill string
常見(jiàn)例句
- Finally under the combined effect of alternating load, impact load, corrosion and other factors, early fatigue failure of drill-string happens.
④最后鉆具在交變載荷、沖擊載荷、腐蝕等因素的聯(lián)合作用下發(fā)生早期疲勞斷裂失效。
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