文档介绍：several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 measuremen害争锋，但人力很难战胜灾害。因此虽然每年二次收稻，但是一年中有一段黄青不接的日子，一天三顿，翻来覆去的，都只是地瓜稀粥或稀粥地瓜。记得那时一碗饭，其实尽是地瓜，唯有碗里面漂着一些稻谷。哎，每年‘面朝黄土背朝天’地辛勤劳作，家中却仍然一贫如洗，连木瓦房都盖不起。一家人只能蜗居在茅屋子里，要是没下雨倒还好哩，若下雨啊，茅屋子里肯定滴答滴答响个不停·····”
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 measurement, such as proceeds of c values are equal and equal to the design value, then the vertical installation accurate. For example a, b, and c valueswhile on horizontal vertical errors for measurement, General in iron angle code bit at measurement level points grid errors, specific method is from baseline to methyl vertical box center line distance for a,, to b vertical box distance for b, list can measured
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 measurement, such as proceeds of c values are equal and equal to the design value, then the vertical installation accurate. For example a, b, and c valueswhile on horizontal vertical errors for measurement, General in iron angle code bit at measurement level points grid errors, specific method is from baseline to methyl vertical box center line distance for a,, to b vertical box distance for b, list can measured
several group number, then with b ± a, =c,c is