工程图:
| 
 编号  | 
 口径  | 
 管内径  | 
 管外径  | 
| 
 680507  | 
 3/4''  | 
 7.5–8  | 
 10.5–12  | 
| 
 680502  | 
 3/4''  | 
 7.5–8  | 
 12–14  | 
| 
 680503  | 
 3/4''  | 
 8.5–9  | 
 12–14  | 
| 
 680500  | 
 3/4''  | 
 9.0–9.5  | 
 14–16  | 
| 
 680501  | 
 3/4''  | 
 9.5–10  | 
 12–14  | 
| 
 680506  | 
 3/4''  | 
 9.5–10  | 
 14–16  | 
| 
 680515  | 
 3/4''  | 
 10.5–11  | 
 14–16  | 
| 
 680517  | 
 3/4''  | 
 10.5–11  | 
 16–18  | 
| 
 680524  | 
 3/4''  | 
 11.5–12  | 
 14–16  | 
| 
 680526  | 
 3/4''  | 
 11.5–12  | 
 16–18  | 
| 
 680535  | 
 3/4''  | 
 12.5–13  | 
 16–18  | 
| 
 680537  | 
 3/4''  | 
 12.5–13  | 
 18–20  | 
| 
 680544  | 
 3/4''  | 
 13.5–14  | 
 16–18  | 
| 
 680546  | 
 3/4''  | 
 13.5–14  | 
 18–20  | 
| 
 680555  | 
 3/4''  | 
 14.5–15  | 
 18–20  | 
| 
 680556  | 
 3/4''  | 
 15–15.5  | 
 18–20  | 
| 
 680564  | 
 3/4''  | 
 15.5–16  | 
 18–20  | 
| 
 680505  | 
 3/4''  | 
 17  | 
 22.5  | 




