Intension and extension of bored piles part in budgetary rating of new bridges and culverts;
新桥涵预算定额钻孔桩部分的内涵与外延
Discussion on determination and application of construction rating of railway capital repairs;
铁路大修理施工定额的确定与运用
This paper analyses and discusses five means of forecasting petroleum drilling cycle in the world, including historical level method, typical cases method, learning curve method, procedure work-hour method and cyclic rating method.