The H-bend wave-guide is the important part of the serve radar, and it is widely machined and applied.
H弯波导件为军用雷达上的重要构件，加工量大，应用广泛。
2
Conclusion: We use L as arch length and H as chord length to bend syringe needle that is used to posterior superior alveolar nerve block anesthesia by intraoral injection. The success rate is 98%.