束间间距
distance of adjacent scanning lines
右心室收缩时间间距
systolic time interval of the right ventricle
FL-6型包缠纺粗纱机
roving frame FL-6 for wrapping spinning
FMV36粗纱机
FMV36 vertical rubbing frame
玻璃纤维无捻粗纱
woven glass roving fabric
粗糙元间距
roughness elements spacing