d) Lỗ lắp bulông vòng (móc cẩu)1. M

Mounting Holes bolt circle) (hook)1. Purpose: Insert the hook.2. request-Tolerance to low position.-Check the diameter tolerances under standard table lace.-For example: M16, then drill holes Ø14 lace step 2. User taps M16.3. The method of machining: drilling + taro.

d) mounting bolt hole ring (hook)
1. Purpose: Insert hook.
2. Requirements
- Tolerance low position.
- Tolerance diameter threaded standard reference to the table.
- For example, the drill hole M16 threaded step O14 M16 taro 2. Use your nose.
3. Processing method: Drilling + taro.