1. Models of heald penetration rods
 1. Models of O-shaped heald penetration rods
 (1) Markings of A-shaped heald penetration rods
 Example:
 Suitable for closed O-shaped heddle ear healds, length 1000mm, width 9mm, thickness 1.5mm, the distance from the end of the heddle rod to the center of the hole is 16mm, the A-shaped heddle rod with a hole diameter of 3.2mm is marked: Heddle rod AO1000× 9×1.5—16—3.2. 
 (2) Marking of B-shaped heald rod 
 Example: 
 Applicable to closed O-shaped heddle lug healds, length 1000mm, width 9mm, thickness 1.5mm, from the end of the heddle rod to the center of the hole The mark of the B-shaped heald rod with a distance of 16mm and a hole diameter of 3.2mm is: heald rod BO 1000×9×1.5-16-3.2. 
 2. Model of J-shaped heald threading rod 
 Suitable for J-shaped heald lug steel plate heald threading rod, length 1000mm. 
 The mark of J-shaped heald penetration rod is: Heddle penetration rod 1000-J
 3. Model of C-shaped heald penetration rod 
 Suitable for C-shaped heald lug steel plate heald penetration rod, length 1000mm. 
 The mark of the C-shaped heddle passing rod is: heddle passing rod 1000-C. 
 2. The technical specifications and manufacturing companies of the heddling rods 
 are shown in Table 6-4. 
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