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What does JL before the contract number mean?
Supervision (JL), cost consultation (ZJ) and other contracts.

4。 3. Construction contract (building, code SG): including building (JZ), installation (AZ), decoration (ZS), municipal construction (SZSG) or installation (SZAZ).

CB is the acronym of the contract. CB is a form commonly used by contractors and belongs to the category of application form.

JL is the initials of supervision, and JL is a common form of supervision institutions.