“pitch mining”的概念、定义、翻译、参考文献-科学参考

单词	pitch mining
释义	pitch mining [`pich ´mīn·iŋ] ^{MINING ENGINEERING} Mining coal beds with steep slopes.
随便看	Eurotiales Euryalae Euryalina Euryapsida eurybathic eurycephalic Eurychilinidae euryene eurygamous euryhaline Eurylaimi Eurylaimidae eurymeric Eurymylidae euryon Euryphoridae euryplastic euryprosopic Eurypterida Eurypygidae eurypylous eurysome eurytherm Eurytomidae eurytopic

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