Upper and lower pairs of yarns illlustrated at 11a, 12a and 13a, 14a, respectively, are fed to {TAIL ~ upper and lower air jet devices} carried by the mounting means B which is illustrated in the form of {HEAD ~ an upright standard} 
Upper and lower pairs of yarns illlustrated at 11a , 12a and 13a , 14a , respectively , are fed to { TAIL ~ upper and lower air jet devices } carried by the mounting means B which is illustrated in the form of { HEAD ~ an upright standard }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD