定期 ていき保全 ほぜん

teikihozen

1. Not regular maintenance.; Not scheduled maintenance.

1. Was regular maintenance.

1. Regular maintenance for/on

1. Periodic maintenance; Regular maintenance

1. It is not regular maintenance.; It's not a scheduled inspection.

1. It's not regular maintenance.; It's not a scheduled inspection.

1. Was regular maintenance.

1. Regular maintenance.

1. Not regular maintenance.; It is not regular maintenance.

1. Wasn't regular maintenance.; Wasn't scheduled maintenance.

1. Probably regular maintenance.

1. Was not on a regular maintenance plan.; Was not regularly maintained.

1. Wasn't regularly maintained.; Wasn't on a maintenance schedule.

1. Probably regular maintenance.; Likely to be regular maintenance.

1. Was not on a regular maintenance plan.; Was not under regular maintenance.

1. If/when regular maintenance…; If regular maintenance were…

1. If it's regular maintenance; If regular maintenance is done

1. If regular maintenance; When regular maintenance