flange length of head

例句：

1. 1. The new machine has a longer flange length than the old one.
   新机器的法兰长度比旧机器长。
2. 2. The flange length is critical for ensuring proper alignment of the joint.
   法兰长度对于确保接头正确对齐至关重要。
3. 3. The engineer measured the flange length to ensure it met the required standards.
   工程师测量了法兰长度，以确保它符合所需的标准。