APA (7th ed.) Citation

LIANXIN, L. (1993). Self-locking theft-proof manhole cover (5.).

Chicago Style (17th ed.) Citation

LIANXIN, LU. Self-locking Theft-proof Manhole Cover. 5. 1993.

MLA (9th ed.) Citation

LIANXIN, LU. Self-locking Theft-proof Manhole Cover. 5. 1993.

Warning: These citations may not always be 100% accurate.