Please read carefully and fill into actual information.

请仔细阅读并属实填写。

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It can couple with two plugs simultaneously, and makes the drilling fluid fill into casing in turn and quickly. This can simplify the cementing operation, prevent cement pollution.

可同时装两个胶塞，既可用于常规双塞固井，又可用于连续式双级注水泥作业。

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Ideas include using them to fill land or making them into liquid fertilizer or letting people eat them.

VOA: special.2009.12.15

So carbon has four valence electrons, so if we talk about c 2, again we're going to start filling in our molecular orbitals, and now we're going to have eight electrons to fill into our molecular orbitals.

碳有4个价电子，所以如果我们考虑C2的话，同样，我们开始填分子轨道，现在我们有8个电子,要填入分子轨道。

麻省理工公开课 - 化学原理课程节选

So what we need to do is fill in those extra bonding electrons into our bonds.

因此我们需要,把这些电子也填到键中。

麻省理工公开课 - 化学原理课程节选

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