Tushen gwajin samfurin PetroChina
lasisin kasuwanci na CEPAI
AAA takardar shaidar kiredit
API-6A takardar shaida
API-6C takardar shaida
API-6D takardar shaida
Takaddun shaida na CEPAI don bawul ɗin ball
Takaddun shaida na CEPAI don bawul ɗin ball
Jiangsu sanannen samfuran samfuran
Takardar shaidar AAA na tsarin sarrafa ma'auni
Takaddun daidaiton aminci
20211216 CE takardar shaida
SIL takardar shaida na actuator
SIL takardar shaida na actuator
API-Q1 takardar shaida