Rocks dug up during construction were saved and incorporated into the poured-concrete floors and walls. Hydronic heating coils in the floor are augmented by a wood stove during the damp winters. Search “GSBM안전【에프비엠.com】강북점ㅰGSBM거래㎖gsbm7만원Уgsbm증거금┴GSBM8만원≡abnormalcies” from Diamond in the Rough (and Ready)

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Rocks dug up during construction were saved and incorporated into the poured-concrete floors and walls. Hydronic heating coils in the floor are augmented by a wood stove during the damp winters.