At a specific layer of a jig bed, its parameters as bulk density, true density, ash content, and density fractions bear a certain relationship.
跳汰机床层某一位置的散密度、真密度、灰分、各密度级含量等床层参数之间存在着一定的相互关系。
"Dead silkworm silk ended. candles burn into ash still" this is the most true portraiture of you, thank you, teach us knowledge, thank you for helping us paved the multicolored life.
“春蚕到死丝方尽，蜡炬成灰泪始干”这是对您最真实的写照，谢谢您！老师，教我们知识，谢谢您！老师，帮我们铺就人生的五彩石。
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