This is a reversal thinking operation concept against the pipe drilling method of casing pipe wall protection described in conventional books.
本方法与书本上所述的套管护壁跟管钻进方法有反向思维操作概念。
North Africa necessitated a complete reversal in our thinking.
进攻北非的决定，要求我们在思想上完全转变。
The decision to invade North Africa necessitated a complete reversal in our thinking.
进攻北非的决定，要求我们在思想上完全转变。
The decision to invade North Africa necessitated a complete reversal in our thinking.
进攻北非的决定，要求我们在思想上完全转变。
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