(一)目前我国各地生产矿用胶布导风筒的工艺,基本有两种:一种是采用缝制工艺进行生产,漏风率较高,使用寿命较短;另一种全部采用胶粘的方法生产。吉林厂系采用后一种方法生产的,但由于在裁断和粘合过程中有允许误差,在两个导风筒接头处往往有漏风的现象存在,因而也会给井下通风带来不利影响。为此我厂广大革命职工,在厂党支部和革委会的直接领 (A) At present, there are basically two kinds of processes for producing the duct tape for mining adhesive tape in our country: one is the production by the sewing process, the higher the air leakage rate is, and the shorter the service life; the other one adopts the adhesive method produce. Jilin plant using the latter method of production, but due to the cutting and bonding process in the allowable error in the two air duct joints often have the phenomenon of air leakage, which will also bring adverse effects underground ventilation. To this end, I plant a vast majority of revolutionary workers, plant branch and the Revolutionary Committee directly led