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Pollution-free characteristics of shepherd's purse The main root of shepherd's purse is relatively developed, and the growth of fibrous root is weak, white, and not suitable for transplanting. During the vegetative growth period, the stems are...
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According to the development trend of lighting technology, Wacker Chemie Co., Ltd. has recently developed a variety of silicone products for LEDs, or used as packaging materials to protect components, or to directly form optical lenses on LED chips....