Examine the check valve, cut off valve of auto water supplying system see if open or close correct.
检查自动给水系统的止回阀，截止阀等各阀是否正确开启或关闭。
Model GK8-24 double-needle four-thread bag sewing closer adapted two paralleled double thread chain stitch with auto-cut system.
袋口热合封口机，可同时缝制两条平行的双线链式线迹，具有更佳的密封性。
Model GK8-24 double-needle four-thread bag sewing closer adapted two paralleled double thread chain stitch with auto-cut system.
袋口热合封口机，可同时缝制两条平行的双线链式线迹，具有更佳的密封性。
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