Officer: This is BFD company. May I help you?
工作人员：这是BFD公司，我可以帮您什么忙吗？
Zhuhai BFD Co., Ltd was founded in 2000 which is mainly engaged in designing, producing and marketing all kinds of products of doors and Windows.
珠海百富多有限公司创立于2000年，专业设计、生产及销售各种门窗产品。
The BFD is based on SI modular block, the generalized differentiator(GD) proposed in this paper. Various differential functions can be performed by the GD.
这种BFD是用本文提出的SI模块，通用差分器（GD）构成的，此GD具有多种差分功能。
The BFD is based on SI modular block, the generalized differentiator(GD) proposed in this paper. Various differential functions can be performed by the GD.
这种BFD是用本文提出的SI模块，通用差分器（GD）构成的，此GD具有多种差分功能。
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