The presence of exogenous surface contamination, including dirt, grease, free iron from contact with steel tooling, and so forth, may interfere with the formation of the passive film.
外生的表面污染，包括：尘土、油脂、来自钢铁加工的游离铁等等，可以影响到钝化膜的生成。
It is suggested in this paper that a kind of contact-free circuit for comparison and control should substitute for the conventional contact one in the back-forth wrapper web position control system.
提出在卷筒包装纸进退式光电定位系统中，采用无触点（全电子式）比较判别及控制电路，替代目前常用的触．点式同类电路。
If given by the Contractor to Oracle it shall be sent by registered mail, addressed to the Oracle client at the address set forth in the contact and a copy hand delivered to the client.
如果是承包人通知甲骨文，应以挂号信方式寄给甲骨文，并以合同上所示的地址作为收件地址。
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