Higashiyamayudenkatsurazawanagaokashinokoudouborisaiyushisetsuyusoumadeshakouwohorisageaminomenoyounisuiheikouwomegurashitenijimidasugenyuwoatsumeruyusouchuunozanzonyunokaishuuniyuukoudoitsukarainyuushitagijutsudagagenzaidehasekaidetada1kashonokotteirumezurashiisaiyuhoushikidearu

斜め網代

露天掘衰退に伴い坑内掘の大発展へ : 各坑に大堅坑、大斜坑を開鑿 : 撫順の新採炭方針

石油採掘増加

年度別採掘坑内図

支那油田採掘権 [社説] : [支那油坑採掘権問題(米国スタンダード会社獲得) (其十)]

陝西油坑の運命 : [支那油坑採掘権問題(米国スタンダード会社獲得) (其九)]

商工省、積極的に石油試掘を奨励 : 新に坑道掘法も採用

支那の石油坑 [社説] : [支那油坑採掘権問題(米国スタンダード会社獲得) (其十一)]

Shakaisou o horu

竹藪　杉谷層　採掘計画図

杉谷二尺土間層採掘計画図

北樺新石油会社は採油本位 : 試掘を従とし採油に全力傾倒

日本の油権要求 : [支那油坑採掘権問題(米国スタンダード会社獲得) (其十八)]

北樺太の石油採掘計画すすむ

米国の新油源 : 頁岩採掘に着眼

ス社獲得の石油鉱 : [支那油坑採掘権問題(米国スタンダード会社獲得) (其十九)]

米支石油契約 : [支那油坑採掘権問題(米国スタンダード会社獲得) (其十五)]

油権獲得問題 : [支那油坑採掘権問題(米国スタンダード会社獲得) (其十六)]

油田借款葛藤 : [支那油坑採掘権問題(米国スタンダード会社獲得) (其二十)]

石油権獲得問題 : [支那油坑採掘権問題(米国スタンダード会社獲得) (其四)]

油田獲得と投資 : [支那油坑採掘権問題(米国スタンダード会社獲得) (其三)]

支那油田と我国 : [支那油坑採掘権問題(米国スタンダード会社獲得) (其二)]

斜め取りに網目と筋ぼかし

開□炭坑 採掘を一部停止 : 販売不如意から

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