airshed英'eəʃed美'eəʃedCOCA¹⁴³³¹⁵BNC²³⁶²¹³⁺¹ 基本例句 机库,风干棚 Using diesel tail gas drilling, the determination of airshed, necessary equipment, downhole BHA and drilling technology measures etc. are presented in this paper. 文中介绍了利用柴油机尾气钻井中气量确定、必要的装备、井下钻具组合和尾气钻井工艺措施等。 cnki