Electric scheme for design use. Colour illustration. bPk9BPRe81xQ/LGJuazYC5psvZHKDSCq6HXNbXFWYh5IcJTXeCE5TpehoCxwbi7RlWVmTe8q5w/mSon8oR7DgpLVh0xFHA90qvv83DZ+mtTPDDYmD6wx6/q9LxzatRd52Kyccjh2EaTyIO9GJaxnV2WZk0gprqE55RAETkHQF3ZjRvm/dmyUGp+wVSIOIYYqnzSmrTtLiAF4bHg8GPoJ+OHp5XcUs2sdWFhefnyMFZS5UEb8fWuwh5GQ4kDeqyUgBrsynAVvLaM=