"挤塑生产流水线" can be translated into English as "extrusion production line".
Here, "挤塑" (jǐ sù) refers to the extrusion process in plastic manufacturing, where plastic material is forced through a die to form a continuous profile. "生产流水线" (shēng chǎn liú shuǐ xiàn) translates to "production line," indicating a series of connected workstations or machines where products are manufactured in a continuous and sequential manner.
Therefore, combining these terms, "挤塑生产流水线" is accurately conveyed as "extrusion production line."