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classificationCode:"ipc:f16n"
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classificationCode:"ipc:f16l"
Special automatic unhooking and hooking device for acid mist room
Sleeve type synchronous lifting assembly capable of sealing in place
Sheath penetrating device and sheath penetrating process for oval linear array
Sealing ring assembly for vehicle, vehicle and sealing performance detection method
Plugging device for petroleum pipeline construction and detection method of plugging device
PICP dry etching power-off helium leakage detection equipment