C. Free to adjust the pressure, widely used in the factory assembly line operation.
压力随意调整,广泛应用于流水线生产。
Set in research, production, sales integration business, there's a factory assembly line.
集研究、生产、销售一体化企业,旗下有一家生产厂流水线。
Adjustments for envelope squeeze on seats and valve testing are done by machine during factory assembly.
在工厂组装期间,采用机械设备对阀座和阀门测试封装挤压进行调整。
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