压缩包内容概览：
45° elbows, Type 5041 STEP ; 90° radius elbows, Type 5090 STEP ; Long 90° radius elbows, Type 5002A STEP ; Long 90° street elbows, Type 5001A STEP ; Short 90° radius street elbows, Type 5092 STEP ; Street elbows 45°, Type 5040 STEP ; 45° elbows, Type 5041,10 ; 45° elbows, Type 5041,108 ; 45° elbows, Type 5041,12 ; 45° elbows, Type 5041,15 ; 45° elbows, Type 5041,18 ; 45° elbows, Type 5041,22 ; 45° elbows, Type 5041,28 ; 45° elbows, Type 5041,35 ; 45° elbows, Type 5041,42 ; 45° elbows, Type 5041,54 ; 45° elbows, Type 5041,6 ; 45° elbows, Type 5041,64 ; 45° elbows, Type 5041,76 ; 45° elbows, Type 5041,8 ; 45° elbows, Type 5041,89 ; 90° radius elbows, Type 5090,10 ; 90° radius elbows, Type 5090,108 ; 90° radius elbows, Type 5090,12 ; 90° radius elbows, Type 5090,15 ; 90° radius elbows, Type 5090,18 ; 90° radius elbows, Type 5090,22 ; 90° radius elbows, Type 5090,28 ; 90° radius elbows, Type 5090,35 ; 90° radius elbows, Type 5090,42 ; 90° radius elbows, Type 5090,54 ; 90° radius elbows, Type 5090,6 ; 90° radius elbows, Type 5090,64 ; 90° radius elbows, Type 5090,76 ; 90° radius elbows, Type 5090,8 ; 90° radius elbows, Type 5090,89 ; Long 90° radius elbows, Type 5002A,10 ; Long 90° radius elbows, Type 5002A,108 ; Long 90° radius elbows, Type 5002A,12 ; Long 90° radius elbows, Type 5002A,15 ; Long 90° radius elbows, Type 5002A,18 ; Long 90° radius elbows, Type 5002A,22 ; Long 90° radius elbows, Type 5002A,28 ; Long 90° radius elbows, Type 5002A,35 ; Long 90° radius elbows, Type 5002A,42 ; Long 90° radius elbows, Type 5002A,54 ; Long 90° radius elbows, Type 5002A,6 ; Long 90° radius elbows, Type 5002A,64 ; Long 90° radius elbows, Type 5002A,76 ; Long 90° radius elbows, Type 5002A,8 ; Long 90° radius elbows, Type 5002A,89 ; Long 90° street elbows, Type 5001A,10 ; Long 90° street elbows, Type 5001A,108 ; Long 90° street elbows, Type 5001A,12 ; Long 90° street elbows, Type 5001A,15 ; Long 90° street elbows, Type 5001A,18 ; Long 90° street elbows, Type 5001A,22 ; Long 90° street elbows, Type 5001A,28 ; Long 90° street elbows, Type 5001A,35 ; Long 90° street elbows, Type 5001A,42 ; Long 90° street elbows, Type 5001A,54 ; Long 90° street elbows, Type 5001A,6 ; Long 90° street elbows, Type 5001A,64 ; Long 90° street elbows, Type 5001A,76 ; Long 90° street elbows, Type 5001A,8 ; Long 90° street elbows, Type 5001A,89 ; Short 90° radius street elbows, Type 5092,10 ; Short 90° radius street elbows, Type 5092,12 ; Short 90° radius street elbows, Type 5092,15 ; Short 90° radius street elbows, Type 5092,18 ; Short 90° radius street elbows, Type 5092,22 ; Short 90° radius street elbows, Type 5092,28 ; Short 90° radius street elbows, Type 5092,35 ; Short 90° radius street elbows, Type 5092,42 ; Short 90° radius street elbows, Type 5092,54 ; Short 90° radius street elbows, Type 5092,6 ; Short 90° radius street elbows, Type 5092,8 ; Street elbows 45°, Type 5040,10 ; Street elbows 45°, Type 5040,108 ; Street elbows 45°, Type 5040,12 ; Street elbows 45°, Type 5040,15 ; Street elbows 45°, Type 5040,18 ; Street elbows 45°, Type 5040,22 ; Street elbows 45°, Type 5040,28 ; Street elbows 45°, Type 5040,35 ; Street elbows 45°, Type 5040,42 ; Street elbows 45°, Type 5040,54 ; Street elbows 45°, Type 5040,6 ; Street elbows 45°, Type 5040,64 ; Street elbows 45°, Type 5040,76 ; Street elbows 45°, Type 5040,8 ; Street elbows 45°, Type 5040,89
