1. Use of O-shaped heddle threading rods
(1) O-shaped heddle threading rods are mainly used for closed heddles or healds.
(2) The O-shaped heald rod is used in conjunction with the heald frame.
2. Use of J-shaped heald penetration rods
(1) J-shaped heald penetration rods are mainly used for J-shaped heald lug steel sheet healds.
(2) The J-shaped heald rod is used in conjunction with the heald frame.
3. Use of C-shaped heald penetration rods
(1) C-shaped heald penetration rods are mainly used for C-shaped heald lug steel sheet healds.
(2) The C-shaped heald rod is used in conjunction with the heald frame.
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