Recessing is the most effective way of preventing creep in unfilled ptfe .
凹入是阻止未加填料的聚四氟乙烯徐变的最有效的方式。
The addition of a set of countersinks for recessing screwheads will allow you to make even better use of the drill .
再加上一套沉头螺丝开孔器能让你更好地利用电钻。
Not long ago , with the country entering a recessing and japan at its pre ? Bubble peak , the u. s.workforce was derided as poorly educated and one of primary cause of the poor u. s.economic performance .