A perfect fit is when top clamp fits firmly down on both steering lever and handlebars while maintaining parallel with the lower casting.
一个完美的结合，是适合时顶部钳位牢固下来都转向杆，把手，同时保持较低的铸造平行。
2
JBL, JBT, JB-TL Specific forms parallel groove clamp is suitable for unendure force splicing and branch on the aerial wire , being used with insulation cover . It's action is insulation protection.