Clinical Study of Tumor Treating Fields Combined with Gemcitabine and Albumin-bound Paclitaxel in the First-line Treatment of Locally Advanced Pancreatic Cancer

"Device: Tumor treating fields Subjects will use tumor treating fields until disease progression or for a maximum of 30 months.~Drug: Gemcitabine hydrochloride and albumin binding paclitaxel Subjects will receive Gemcitabine hydrochloride and albumin binding paclitaxel until disease progression or for a maximum of 30 months."

Drug: Gemcitabine hydrochloride and albumin binding paclitaxel Subjects will receive Gemcitabine hydrochloride and albumin binding paclitaxel until disease progression or for a maximum of 30 months.