沿えん層そう坑こう道どう

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Meanings

1

noun

drift; driftway

Technical mining term for a horizontal passage following a mineral seam.

沿えん層そう坑こう道どうは石せき炭たん層そうに沿そって掘ほられる。
A drift is dug along the coal seam.

run alongside, follow along, run along

層stratum, social class, layer

坑pit, hole

道road-way, street, district

Etymology

Compound of 沿層 (along the seam) and 坑道 (tunnel/gallery). The exact historical derivation is uncertain; the spelling is conventionally associated with mining terminology.