dengannya, kerekayasaan penyediaan air bersih dan pembuangan air kotor, kerekayasaan pengolahan air dan pembersihan sungai,, disain mesin, alat, instrumen [termasuk bagian-bagiannya] atau sistem terdiri dari mesin, alat dan instrumen tersebut, pengujian kualitas air, menyediakan informasi kualitas air, pemeriksaan untuk pipa pembuangan dan selokan buang, penelitian konstruksi bangunan atau perencanaan kota(Design of water supply and sewerage, Architecture, Surveying, Design of water treatment plant, Design of water treatment equipment, Design of water supply and sewerage and water-purifier tank, and consultation related thereto, Engineering of water supply and sewerage, Engineering of water treatment and river purification, Designing of machines, apparatus, instruments [including their parts] or systems composed of such machines, apparatus and instruments, Water quality testing, Provision of water quality information, Inspection for drainpipes and drain ditches, Research on building construction or city planning), Disain penyediaan air bersih dan pembuangan air kotor, arsitektur, pekerjaan survei, disain instalasi pengolahan air, disain peralatan pengolahan air, disain penyediaan air bersih dan pembuangan air kotor serta tangki penjernih-air, dan konsultasi yang berkaitan