求翻译：现授权北京华智立恒科贸有限公司在宁夏捷美丰友化肥项目招投标中，代理销售grayloc 的产品。我公司将在投标过程中给予技术支持。此授权书有效期：自授权之日起二年是什么意思？

Is authorized the Beijing Hua Zhili Constant Electronics Co., Ltd. Ningxia Jie Mei Fung Friends of the fertilizer project bidding, sales agents grayloc products. I will be in the bidding process to give technical support. This authorization is valid: since the date of grant of two years

Beijing, China, is hereby authorized, Hang Seng-Co. ,Ltd in Ningxia, Czech Republic and the United States chemical fertilizers & Friends project bidding, grayloc product sales. My company will be in the bidding process for technical support. Such a power of attorney is valid: From 2 years of the

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Beijing Hua Zhi Li Heng trading company in Ningxia is hereby authorized Jie Mei Toyotomo fertilizer in project bidding, sales agent of grayloc products. Our company will give technical support in the bidding process. This authorization is valid: two years from the date of authorization

North presently is authorized the national capital wisdom to set up the permanent branch trade limited company to incur in the bid in the Ningxia Czechoslovakia America abundant friend chemical fertilizer project, the proxy sells grayloc the product.Our company will give the technical support in the