http://docs-asia.electrocomponents.com/webdocs/0e32/0900766b80e32463.pdf
单刀单掷的少.
http://china.rs-online.com/web/c/relays/general-purpose-relays/non-latching-relays/?page-offset=20&sort-by=default&sort-order=default&view-type=List&applied-dimensions=4294646850,4294649013,4294654024&lastAttributeSelectedBlock=4294657717