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本设计利用弹簧的恢复力快速、准确地夹持管件，钳口与被夹持管件之间采用三处接触，利用自锁原理使工作牢固可靠。
The design uses the spring restoring force to quickly and accurately hold the pipe, the clamp and the pipe is clamped between the three contacts, the use of self-locking principle makes the work of solid and reliable.