森林认证已有一段时间的历史最早的森林认证活动可以追溯到1941 年成立的美国林场体系（ATFS），然而,随着1993 年森林管理委员会（FSC）的创立，对森林认证的兴趣和要求才显著提高。
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...te, through the Forest Stewardship Council (FSC), Sustainable Forestry Institute (SFI), American Tree Farm System (ATFS), or such other similar organizations as may be approved by the Regulatory Agency.
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ETC's latest training profile allows pilots to practice this important skill within the confines of its ATFS-400 Phoenix training system.
ETC公司最新的培训方法允许飞行员在其封闭的ATFS - 400凤凰训练系统锻炼重要技能。
Traditional ATFs, however, are unable to meet these extreme requirements, and new fluids have emerged with each new advancement in transmission engineering.
传统的燃料当中，但是，无法满足这些极端要求，有新的流体中的每个传输工程出现新的进展。
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