several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 measuremen然海域470多万平方公里，发展海洋事业具有得天独厚的条件，也为海防提出了繁重的任务。X铭传曾经这样描绘祖国沿海的地理走势：“中国负山俯海，雄绝六州，自鸭绿划朝鲜，北行至旅顺，极山海关，南下经大沽、XX……抵钦、濂，延万三千里⑷，虎视环球，实有秦人开关延敌之势”。接着他用简练的文字，讲了一段令人扼腕的历史：“故汉唐之盛，海外万国，奔走来王。自欧美崛兴，利炮坚船，横轹海表。中国数千年一统之势廓焉尽变。”⑸这样一个强盛的帝国竟然很快就“廓焉尽变”，成为一个倍受欺凌的弱国。这常使X铭传痛心疾首，仗剑长啸，也是后人不得不认真总结的沉痛历史教训。
古代中国一直是世界上最发达的国家之一。直到15世纪末，中国制造业占世界份额1/3以上，粮食亩产为西方的3倍。中国在海上也曾称雄一时，明初X和率领大型船队浩浩荡荡行经亚非30多个友好远播四海。
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 poin
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