“draw slate”的概念、定义、翻译、参考文献-科学参考

单词	draw slate
释义	draw slate [`drȯ ´slāt] ^{MINING ENGINEERING} A soft rock, 2 inches to 2 feet (5 centimeters to 0.6 meter) thick, that lies above a coal seam and falls with the coal as it is excavated, or soon after.
随便看	Lagrange-Hamilton theory Lagrange-Helmholtz equation Lagrange's equations Lagrange's formula Lagrange's theorem Lagrange stream function Lagrangian Lagrangian coordinates Lagrangian current measurement Lagrangian density Lagrangian equations of motion Lagrangian function Lagrangian generalized velocity Lagrangian method Lagrangian multipliers Lagrangian points Lagriidae lag screw lag time Laguerre polynomials Laguerre's differential equation Lagynacea balanced bridge balanced circuit balanced cloth

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