Pressure test of segmental pigging: cleanup sundries, free rust, drainage and exhaust in pipe.
Pressure test of segmental pigging: cleanup sundries, free rust, drainage and exhaust in pipe.
分段清管扫线试压：清除管线杂物、浮锈、排水、排气。
Pressure test of segmental pigging: cleanup sundries, free rust, drainage and exhaust in pipe.
分段清管扫线试压：清除管线杂物、浮锈、排水、排气。