pin retainer spring 销护圈弹簧

brake retainer spring 制动器挡圈弹簧

main nozzle retainer spring 主喷嘴扣紧簧

lens retainer spring 透镜护圈簧

fin retainer spring 舵制动簧

lens processing retainer spring 透镜护圈簧

UPPER SPRING RETAINER 上弹簧座

lock valve spring retainer 气阀弹簧锁头

UPPER VALVE SPRING RETAINER 上气门弹簧座