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针板前方没有包线头(收空线环)装置,可将空线环包入包缝线内,减少打结工序,并装有特殊松线装置俗称顶线),在抬压脚同时松开二根机针线,适用于内裤、T恤衫等。 There is yarn covering head in front of its needle plate (the unit receiving idle yarn ring ),and this unil packs idle yarn ring into over seanign yarn and reduce knot steps, and has special release device (called mean yarn device),and releases two yarns whlle yaking up presser foot, lt is appllcable to drawers and T-shirts. 机器型号:HL747F-514M5-23/BK 用途:适用于内衣两侧、T恤衫的袖口等倒回缝(四线)。 使用机针:DC-27 11# 针数:2 线数:4支 针距:2MM 线迹长度:0.5-3.6MM 线迹宽度:3MM 差动比:0.7-2.0 压脚提升量:6.0MM 缝制速度:6000rpm