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- A special brush for laboratory total nitrogen detection05-19
- Cycling lockers and combined circulation storage devices for sample storage05-19
- A multi-layer filter bottle and solid-liquid separation and filtration device05-19
- A building energy-saving rainwater collection device--Li Guanglong05-19
- A multifunctional cleaning brush05-19
- A height-adjustable potting container for testing soil composition05-19
- An experimental container cleaning device05-19
- A portable multi-functional surveying and mapping equipment box05-19
- A garbage cleaning device for farmland water conservancy projects05-19
- An experimental device for monitoring soil expansion and contraction characteristics05-19
- An indoor culture gas collection device suitable for soil respiration05-19
- A slope measuring device for land engineering-certificate05-19