Syarikat yang berdaftar di Singapura: 2 Disember 1970

4 syarikat

PRESTON CORPORATION (PTE) LIMITED Kod pendaftaran: 197001089H Alamat rasmi: 30 SHAW ROAD, #05-01/02, ROCHE BUILDING, 367957, Singapore

WBL TECHNOLOGY (PRIVATE) LIMITED Kod pendaftaran: 197001090D Alamat rasmi: 801 LORONG 7 TOA PAYOH, #03-01, WBL BUILDING, 319319, Singapore

UNDERWATER MAINTENANCE (PRIVATE) LIMITED Kod pendaftaran: 197001092E Alamat rasmi: 101 CECIL STREET, #16-05, TONG ENG BUILDING, 069533, Singapore

LUEN HENG COMPANY (PRIVATE) LIMITED. Kod pendaftaran: 197001091N Alamat rasmi: 50 AMOY STREET, 069876, Singapore