GB - Chinese national standards

Chemical conversion coatings--Black oxide coating on iron and steel--Specification and test methods

Available languages: English, Chinese

Available design: electronic design (pdf), Print design

Reliability requirements and testing methods for non-broadcast video tape recorders

Available languages: English, Chinese

Available design: electronic design (pdf), Print design

Time base stability of non-broadcast video tape recorders

Available languages: English, Chinese

Available design: electronic design (pdf), Print design

PCM encoder/decoder system for audio recording

Available languages: English, Chinese

Available design: electronic design (pdf), Print design

Methods of measurement on microphones and earphones for speech communications

Available languages: English, Chinese

Available design: electronic design (pdf), Print design

Blank detail specification for LED numeric displays

Available languages: English, Chinese

Available design: electronic design (pdf), Print design

Test methods for minority carrier lifetime in bulk silicon and germanium—Photoconductivity decay method

Available languages: English, Chinese

Available design: electronic design (pdf), Print design

Cast copper alloy integral flanges

Available languages: English, Chinese

Available design: electronic design (pdf), Print design

Copper alloy welding neck flanges

Available languages: English, Chinese

Available design: electronic design (pdf), Print design

Copper alloy plate flanges for brazing or welding

Available languages: English, Chinese

Available design: electronic design (pdf), Print design