About YUROV V L
About KLOCHKOV V F
About YAROKHNO M S
About KOKHANOVSKIJ V V
About Promyshlennoe Stroitel'stvo
About earthwork
About blasting
About Earthwork planning,earthwork
About Other various foundations and foundation works
About 施設
About 掘削
About 発破
About 岩石
About 土壌
About 採掘