Must check gas above all , must discharge by the regulation when gas is accumulative , answering only tasteful in gas chroma does not exceed 1 , 0 , carbon dioxide chroma does not exceed 1 , 5 , air composition accords with regulations when the 100th requirement , ability works 必须首先检查瓦斯，当瓦斯积聚时必须按规定排放，只有在回风流中瓦斯浓度不超过1 、 0 ，二氧化碳浓度不超过1 、 5 ，空气成分符合规程第一百条要求时，才能作业。
These questions can be answered only through research . on the basis of the current situation in china , the cooperation with india should have its stratification and emphasis . on the starting point of the formation and the background of international economic - trade collaboration , we study the characteristics of the development of economic - trade collaboration in this paper . thus we develop the strategy of china - india economic trade and hope to offer the thoery and reality basis to the exploration of proper economic strategy in china 立足我国当前的现实国情,我们与印度的经济合作应该是有层次、有重点的。本文以中印国际经济合作的形成及其背景作为研究的出发点,在此背景下研究双方经济合作的发展特点,并由此提出我国与印度经济合作的发展战略,希望藉此为探索符合中国国情的经济发展战略提供一些理论和现实的依据。
