setelah pipa utama muncul di sebera

setelah pipa utama muncul di seberang jalur, maka pipa yang kotor dibersihkan terlebih dahulu.

Hasil (Inggris) 1:

After the main pipeline appeared across the line, then a dirty pipe cleaned first.

Hasil (Inggris) 2:

after the main pipe popped across the stripe, the pipes were dirty cleaned first.