Then after thick, the essence two axle diameter localization drills the thread, the keyseat and the mill crank end surface.
机加是规定产件机加程和操作方法,是指导生产的重要的技术性文件。
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An updated travel alert stated that all sailings have been canceled through the end of May as the company continues to " refine our protocols and await further technical guidance from the CDC [U.S. Centers for Disease Control and Prevention]" .
一份更新旅行警报称,随着公司继续“完善们协议并等待 CDC [美国疾病控制和预防中心] 进一步技术导”,所有航行都已取消到 5 月底。