Development of a New Kind of Prepad;

A new front preheating process to get higher blast temperature on pebble stove was put forward according to low blast temperature and shortage of high heat value gas in Chinese iron and steel industry.

Borehole stability prediction before drilling for formations under the second section in an exploration well;

Objective Analysis antepartum forecase and intrapartum treatment to shoulder dystoc-ia,in order to decrease the complication of maternity and neonatal caused by shoulder dystocia.