Ojbective To probe the relationship between the serum lead of the copper smeltery workers and the occupational exposure.

目的探讨铜冶炼工人血铅与职业性暴露关系。

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Atmospheric corrosion of pure copper under sheltered and unsheltered exposure conditions during 1 year period in Shenyang atmosphere is studied.

通过1年的遮雨和未遮雨大气暴露实验，研究了在沈阳大气环境下纯铜的初期腐蚀行为。

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Subjects completed a questionnaire regarding their lifetime occupational and recreational exposure to solvents, pesticides, iron, copper and manganese.

此项研究的调查表包括调查研究对象整个生命周期职业和生活中溶剂、杀虫剂、铁、铜和锰的暴露史等。

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Funds reduced their net short copper exposure following rises in recent weeks.

FORBES: Speculators Start Buying Metals Futures, Options Again - CFTC

Soros also cut stakes in miners such as Nova Gold and Kinross Gold while opening a small position in Freeport McMoran, which has exposure to both copper and gold. (Note: All valuations used here represent May 17 closing prices unless noted).

FORBES: Gold, Banks On The Agenda For Billionaires Soros, Paulson In Q1

Among his individual gold equity positions, Paulson took the biggest hits in AngloGold Ashanti, Freeport McMoran (which has exposure to several other metals including copper and silver), and Novagold.

FORBES: Hedge Fund Billionaires John Paulson And David Einhorn Lost $640M In Gold Market Collapse