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钻井或挖掘井

1 byte removed, 22:26, 11 January 2016

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|style="background:#efefef;"|<div class="center" style="width:auto; margin-left:auto; margin-right:auto;">[[手钻-管井 | 手钻-管井]]</div>

|style="background:#efefef;"|<div class="center" style="width:auto; margin-left:auto; margin-right:auto;">[[冲击钻井 | 冲击钻井]]</div>

|style="background:#efefef;"|<div class="center" style="width:auto; margin-left:auto; margin-right:auto;">[[冲击钻井 — 石锤法r 石锤法 | 冲击钻井 — 石锤法]]</div>

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