求翻译：导管采用专用的卡口式导管，导管内径30cm，分节长3m，最下节长6m。导管制作要坚固、内壁光滑、顺直、无局部凹凸。各节导管内径大小一致，偏差≯±2mm。是什么意思？

Catheter using a dedicated bayonet tube, tube diameter 30cm, sub-section length 3m, most under the length and 6m. Catheter to produce strong, smooth wall, straight, no local bump. Sections of pipe diameter the same size, deviation ≯ ± 2mm.

The cards use a dedicated duct duct mouth, the inside diameter of the pipe 30 cm long, sub-section 3M, 6m long section under most. ducts to produce strong, the inner wall has been smooth, smooth, no partial intaglio. The inside diameter of the pipe sections, unanimous size DEP ± 2mm deviation.

The drive pipe uses the special-purpose bayonet socket type drive pipe, drive pipe inside diameter 30cm, sectionalizes long 3m, most under festival long 6m.The drive pipe manufacture must firm, the endophragm smooth, along straight, not partial concave-convex.Various drive pipe inside diameter size

Catheter used for bayonet-type catheter, catheter diameter 30cm, section long 3M, long 6m the next section. Conduit made more robust, smooth, straight, without local bump on the inner surface. Sections duct inner diameter size deviation ≯ 2mm.

Catheter using a dedicated bayonet tube, tube diameter 30cm, sub-section length 3m, most under the length and 6m. Catheter to produce strong, smooth wall, straight, no local bump. Sections of pipe diameter the same size, deviation ≯ ± 2mm.