Ascertaining the change rules of safe production dates and heat-light resources of rice is an important basis for high use efficiency of heat-light resources, and high and stable production.
明确水稻安全生产期及温光资源的变化规律，是提高温光资源利用率和实现水稻高产稳产的重要基础。
They are mainly used for electric light resources, vacuum-deposited films, smelting of rare earth metals, electrical contacts, heater and so on.
钨丝、钨杆主要用于电光源、真空镀膜、稀土金属冶炼、电触点以及加热元件等。
They are mainly used for electric light resources, vacuum-deposited films, smelting of rare earth metals, electrical contacts, heater and so on.
钨丝、钨杆主要用于电光源、真空镀膜、稀土金属冶炼、电触点以及加热元件等。
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