Joan Lung ce13143d9d Replaces yet more istypes with helpers (#20806) ...

* uses more istype helpers

* oranges is inefficient

2016-10-10 17:48:35 +13:00

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environmental

Replaces yet more istypes with helpers (#20806)

2016-10-10 17:48:35 +13:00

gasmixtures

Removes chem gas leftovers (#20297)

2016-09-03 19:16:17 -04:00

machinery

Replaces yet more istypes with helpers (#20806)

2016-10-10 17:48:35 +13:00